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Vapour degreasing – A guide for production engineers

Vapour degreasing - guide for production engineers

Vapour degreasing – A guide for production engineers

This guide for production engineers explains why vapour degreasing is the most effective and economical process for cleaning of manufactured components.  The start of a new year is always a good time to review your existing cleaning process and ask yourself  ‘am I using a safe modern solvent for vapour degreasing?’.

Vapour degreasingVapour degreasing is the simplest but most effective degreasing and cleaning process which, until recently, has been subject to little change since it was first invented in the early part of the last century. This is a very mature chemical technology which legislation is now effecting changes so fundamental that the more accurate name for the process “Condensation Cleaning” should be used to reflect the improvements in equipment design, chemistry, reduced emissions, economies in usage of solvents and the subsequent environmental acceptability compared to the open topped tanks so ubiquitous in factories and workshops worldwide. The alternatives in equipment design offer differences in technology, which guarantee the continuing use of this process in the future, need to be considered and understood.

The cleaning tank in the corner of most engineering shops hides a very well researched process using sophisticated chemistry. Its popularity is in its simplicity. The tank sump is heated, fitted with cold coils around the internal surfaces at the top to retain the vapour.  Fill to a few centimetres with a non-flammable solvent able to dissolve contaminants, boil to form a vapour 3 to 4 times heavier than air to fill the tank. Hot solvent vapour condenses on the cooler target parts at workplace temperature. The hot liquid solvent dissolves oil and grease and other contaminants. Used solvent returned to the sump revaporises continuing the cycle until parts have achieved the same temperature as the vapour when, with no further condensation, the process is complete. Simple but perfect. Highly productive and economical, parts removed from the cleaning process are clean, warm, and dry in 5 to 10 minutes.

cleaning tank Historically chlorinated hydrocarbons have been the solvents of choice for the “Condensation Cleaning” process. Compatible with most materials of manufacture, stable in constant use, producing a non-flammable saturated vapour heavier than air at a temperature greater than ambient.  In Europe, the United States and in other advanced industrialised economies increasingly stringent legislation to control emissions of VOCs, especially solvents, has led to new formulations for paints and other coatings where water replaces most of the solvent. In the early days the quality of water-based paints was not as good as traditional solvent-based coatings, but innovation has driven the development of new polymers with results as good as, if not better than, the solvent-based originals.

As with coatings, cleaning systems have had to change. With increasingly demanding standards of cleaning required for precision engineering, electronics, optics etc solvents are often first choice, for reasons outlined above, but these have been targeted by regulators and alternatives are encouraged by the relevant authorities and law makers often without serious consideration of unintended consequences. For example, water-based cleaning is encouraged as the obvious alternative, but this has many disadvantages compared to condensation cleaning as although the machines are simple and relatively cheap the processes require multiple heated tanks for immersion or spray processing or long programmed cycles in batch machines for cleaning, rinsing, and drying. Water based processes are slow, energy intensive and occupy more floor space than solvent-based condensation cleaning equivalents where only one tank with a small footprint is needed, delivering shorter process times and, most importantly for the environment, using minimal energy.

The ideal cleaning process would be “Condensation Cleaning” using water but due to the physical characteristics of the water vapour/steam and the inability to carry onto the surface of the targeted parts surfactants to remove the oil, grease and soils and the difficulty and expense of rinsing and especially drying this can only ever be a dream.

Historically chlorinated hydrocarbons have been the solvents of choice for the “Condensation Cleaning” process. Compatible with most materials of manufacture, stable in constant use, producing a non-flammable saturated vapour three to four heavier than air at a temperature greater than ambient.  The traditional solvents such as trichloroethylene exhibits all these characteristics however concerns about its carcinogenic properties and the danger to operators by exposure, led to a continuing search for a safer alternative. 1,1,1 trichloroethane based solvent formulations became popular in the mid part of the last century as a safer replacement. An excellent solvent, safer for users, it proved to be depleting the protective ozone layer around the Earth and was subsequently banned. With the development of the REACH legislation in Europe, trichloroethylene was again allowed with restrictions and stringent controls for use in authorised machines which control emissions to very low figures close to zero.

High performance vapour degreasing and cleaning  
EnviroTech Europe have been supplying vapour degreasing solvent formulations for 40 years constantly responding to increasingly stringent regulatory requirements for environmental and safety laws and the need for improved cleaning standards.   ProSolv® 5408e is a new sustainable solvent blend with near zero OPD (Ozone Depletion Potential) and GWP (Global Warming Potential) for high performance degreasing and cleaning which ticks all the boxes with the perfect profile for a vapour degreasing solvent. Soft on the environment and safer for users with high performance, improved cleaning, and lower costs. Lower boiling point, economical with energy with low solvent losses, faster production, reduced costs, easy handling. Exceptionally low surface tension to penetrate micron sized holes and close contact surfaces. Sustainable and secure for future use as your ‘forever solvent’.

ProSolv Benefits

Sealed Tanks
As with all legislation for chemical use regulation and restrictions drive development of associated processes and equipment. Sealed tanks are now standard with many different designs available. The most common are discussed below.

The single tank hermetically sealed machines favoured by some manufacturers uses a process tank to contain the solvent and a separate storage tank/vapour generator. Baskets loaded with parts to be cleaned are introduced from the top or through access points on the side of the tank. Lids or doors hermetically seal the tank. Solvent is pumped into the process tank where agitation, ultrasonics or pumped liquid is circulated through the parts. Used Solvent is removed to the vapour generator, condensing coils controlling the vapour are linked to coils located in the vapour zone which, when the cycle is complete, collapse the vapour.  The process tank is emptied. Controlled air introduced to process tank is then recycled through carbon absorption units to remove traces of solvent until the concentration is within regulatory standards when the lid is released for the basket of parts, clean and dry, to be removed and replaced with a further basket. Variations of process within the hermetically sealed tank are possible using sprays of cold or hot condensed solvent, immersion with or without ultrasonics and revolving baskets to cover most of the problems experienced when processing machined and fabricated parts. Continuous external distillation of the contents of the vapour generator is also an option depending on contamination.

The alternative technology is much simpler and uses well tried techniques not requiring the long recovery times of the hermetically vacuum sealed processes. The multilevel system uses a standard vapour degreasing tank design with a sealed loading section above the process tank. Components to be cleaned loaded in work baskets or jigs are fed to the load section by hand or conveyor, an internal platform raises and lowers the baskets in controlled cycles.

Loading complete – the load enclosure is sealed to completely isolate the process. Then seal on the process tank is opened and the basket automatically lowered into the cleaning section which can be simple condensation cleaning or immersion cleaning with or without ultrasonics or power sprays. Revolving baskets can also be added to improve cleaning in blind or through holes or oil ways in castings and fabrications.

On completion the basket rises to the area where the condensation coils are located, and parts allowed to drain and dry, basket raises into the load section when the process tank is sealed. A fan circulates air within the load area which can be recycled through carbon absorption systems if no external exhaust is preferred.

As baskets entering the loading space contain parts drained and dried only very small amounts of solvent are carried in the exhausted air which is monitored to ensure compliance with appropriate legislation. When this is complete the seal opens fully for removal of cleaned components. The loading section can be fitted with top or side seals allowing baskets to flow through on conveyor systems or be removed by hand or hoist. No solvent enters the work area. Both processes will produce parts cleaned to the highest standards but the choice of which offers the best solution needs a little more consideration.

The hermetically sealed vacuum process is complicated with the need to move liquids in the machine. It is relatively slow as the carbon adsorption process has to remove high levels of solvent from the recirculated airstream from the process tank. This is inefficient as adsorption rates for carbon fall rapidly with increasing saturation.  Final levels of solvent in the tank when the lid or loading door opens will be dragged into the workshop and the area where the operator is working. Long process cycles reduce throughput.

The simpler multilevel systems where movement of liquids is not required are more efficient and offer much faster process times.  Cost of manufacture is also reduced as no liquid movement or vacuum is involved. The extracted loading section ensures no leakage of solvent into the work area giving complete safety for operators and factory staff. Envirotech Europe also offers workplace air monitoring to ensure VOC’s from the solvent are within exposure limits and your machine is operating to specification.

Condensation cleaningConclusions
Both designs of process machines discussed above fully comply with the emission regulations of the EU and U.S authorities. Which to choose will depend on many factors which should be discussed with equipment and solvent suppliers who have the experience to advise on which offers the best process for the application. Equipment and solvent must work together, so it is advisable to ensure that the suppliers co-operate to offer a package with high levels of responsible care and product stewardship to ensure the best and safest installation. EnviroTech personnel and distributors are trained to work with equipment suppliers to advise on the use of ProSolv® 5408e vapour degreasing solvent for the most satisfactory outcome.

The “Condensation cleaning” process still gives the highest levels of economical cleaning with minimum energy usage, low footprint on the factory floor, safety for the operator, and high production rates with low solvent usage and environmental impact. With the new generation of sealed cleaning machines its future as the process of choice is assured.
Photograph of Solvac equipment courtesy of C&C Hydrosonics.

 

FURTHER INFORMATION
Please visit our website https://www.envirotech-europe.com/prosolv5408e for information about other uses and applications for ProSolv 5408e.

Visit www.envirotech-europe.com/applications-and-case-studies for information about uses and applications for all EnviroTech Europe products.

For more advice, please telephone us on +44 (0) 20 8281 6370 or use our website contact form.

All products are supplied and supported by EnviroTech Europe Ltd. Manufactured in the United Kingdom and available on short delivery times through our dedicated team of distributors worldwide.

Share this page:

Related Posts

Avionic and electronic component corrosion inhibitor

Avionic and electronic component<br />
corrosion inhibitor

SuperCORR A – Avionic and electronic component corrosion inhibitor

Super CORR A was originally developed for the U.S. Air Force to comply with Mil-DTL-87177B (formerly Mil-L-87177A) specifications. A water displacing lubricant and corrosion protection compound that prevents avionic as well as electrical and electronic components from systems failures caused by corrosion. It is now the industry standard for electrical corrosion protection, for in service maintenance by both military and commercial aircraft major repair and overhaul (MRO) facilities worldwide.

Super CORR A is a unique and proprietary formulation with long-lasting, anti-corrosion inhibitors and components providing a superior lubrication coefficient and protection against moisture, wear, general and fretting corrosion, static electricity, corona, and other electro migration problems. The non-flammable film is only 7 microns (0.007mm) in thick and is formulated without sulphates, chlorides, petroleum-based material, or halogens, to meet the EU RoHS directive.

Manufactured and supplied by EnviroTech Europe Ltd, it is unexcelled in preventing failures of electrical systems and electronic equipment caused by corrosion as well as preventing the corrosion of metal components surfaces, including those of components comprised of dissimilar metals such as those found in aerospace environments.

SuperCORR A - Corrosion Inhibitor

Super CORR A is packaged in aerosol cans make access to component parts easy for the engineering crew in difficult locations and conditions. Unpainted mild steel will not rust on exterior surfaces directly exposed to sea water environments for at least 6 months, protecting electrical connectors, switches, chains, drive shafts from corrosion while maintaining lubrication on moving surfaces.

Use Super CORR A  for protection and lubrication of connectors, electrical systems and switches and mechanical controls during servicing. The ability to displace water from exposed contacts can ensure reliable operation in extreme conditions all in one small aerosol can.

EFFICIENT AND ECONOMICAL

  • Extremely long-lasting, specially formulated and proprietary anti-corrosive inhibitor.
  • Eliminates premature failure of components created by moisture, general or fretting corrosion.
  • Prevents deterioration and contamination on all surfaces of electronic and electrical equipment and mechanical close tolerance moving components.
  • Reliability increased, maintenance intervals increased and costs reduced, manufacturers save costly warranty service calls or product re-call.

APPROVED

  • Industry approval from:  NASA, Boeing Aircraft, Bombardier, Embraer, Lear, Gulfstream, Hawker-Beechcraft, Cessna, Raytheon, Polish Airforce, Northrop-Grumman, Royal Navy and Royal Norwegian Air Force.
  • Exceeds Mil C 81309 Corrosion Prevention Compounds.
  • Approved in US Tri-Service Corrosion Manuals.

FURTHER INFORMATION
Please visit our website https://www.envirotech-europe.com/supercorr-a for  for information about other uses and applications for Super CORR A.

Visit www.envirotech-europe.com/applications-and-case-studies for information about uses and applications for all EnviroTech Europe products.

For more advice, please telephone us on +44 (0) 20 8281 6370 or use our website contact form. All products are supplied and supported by EnviroTech Europe Ltd. Manufactured in the United Kingdom and available on short delivery times through our dedicated team of distributors worldwide.

Share this page:

Video: ProSolv 5408e – Vapour degreasing cycle using hermetically sealed equipment

Vapour degreasing cycle using hermetically sealed equipment.

ProSolv 5408e is a high- performance solvent cleaner used for sustainable and future proof vapour degreasing.  Soft on the environment and safe for users, it offers improved cleaning at lower costs. Low boiling point, economical with energy with low solvent losses, faster production.

Innovation driven by legislation
Vapour degreasing, with or with-out ultrasonics, is the oldest, simplest and most effective solvent degreasing and metal cleaning process used today. It has, until recently, been subject to little change since it was first invented in the early part of the last century. In the UK, Europe, United States and other advanced industrialized economies increasingly stringent legislation to control emissions of VOCs, Solvents with a high Global Warming Potential (GWP), or a high Ozone Depletion Potential (ODP), and those compounds associated with human health concerns has led to Envirotech Europe manufacturing new formulations for precision cleaning solvents with low or near zero potential.​

Halogenated hydrocarbons are the solvents of choice for vapour degreasing and cleaning. The process is essentially simple. A tank with a sump to contain the solvent, heaters at the base and condensation coils around the top section to control the height of the vapour is all that is needed. When heated in the sump halogenated solvents produce, in most cases, a saturated vapour between 3 and 4 times heavier than air at a temperature greater than the ambient temperature of the parts to be cleaned. This allows the solvent vapour to condense on the surface of the parts. The condensate dissolves the contaminants such as oil, greases, flux, and soils returning the used solvent into the sump of the machine for recycling into vapour which continuously condenses onto the parts until they have achieved vapour temperature when, with no further condensation, the process is complete. Parts removed from the cleaning machines are very clean, warm and dry.

The most common halogenated solvents, in use for commercial purposes, are non-flammable so present no risk in this process. Perchloroethylene, used mainly for dry cleaning, methylene chloride previously used widely in paint strippers, 1,1,1- trichloroethane and trichloroethylene used for vapour degreasing were the original materials used based on chlorine chemistry. However continuing concern about the environmental impact and danger to operators by exposure to chlorine-based solvents, especially trichloroethylene, has led to a continuing search for safer alternatives, such as ProSolv 5408e , a trans-1,2-Dichloroethylene based solvent mixture that is non-flammable.

The ProSolv 5408e vapour degreasing process gives the highest levels of economical cleaning with minimum energy usage, low footprint on the factory floor, safety for the operator, and high production rates with low solvent usage or environmental impact. With the new generation of sealed cleaning machines its future as the process of choice is assured.

A more detailed version of this article can be viewed here:
https://www.vapour-degreasing.com/solvent-degreasing-and-metal-cleaning/

Animation of Solvac hermetically sealed equipment by kind permission of CC Hydrosonics Ltd. https://www.cchydrosonics.com/

FURTHER INFORMATION
For more advice, please telephone us on +44 (0) 20 8281 6370 or use our website contact form. All products are supplied and supported by EnviroTech Europe Ltd. Manufactured in the United Kingdom and available on short delivery times through our dedicated team of distributors worldwide.

Share this page:

Latest News

Vapour degreasing – A guide for production engineers

Vapour degreasing - guide for production engineers

Vapour degreasing – A guide for production engineers

This guide for production engineers explains why vapour degreasing is the most effective and economical process for cleaning of manufactured components.  The start of a new year is always a good time to review your existing cleaning process and ask yourself  ‘am I using a safe modern solvent for vapour degreasing?’.

Vapour degreasingVapour degreasing is the simplest but most effective degreasing and cleaning process which, until recently, has been subject to little change since it was first invented in the early part of the last century. This is a very mature chemical technology which legislation is now effecting changes so fundamental that the more accurate name for the process “Condensation Cleaning” should be used to reflect the improvements in equipment design, chemistry, reduced emissions, economies in usage of solvents and the subsequent environmental acceptability compared to the open topped tanks so ubiquitous in factories and workshops worldwide. The alternatives in equipment design offer differences in technology, which guarantee the continuing use of this process in the future, need to be considered and understood.

The cleaning tank in the corner of most engineering shops hides a very well researched process using sophisticated chemistry. Its popularity is in its simplicity. The tank sump is heated, fitted with cold coils around the internal surfaces at the top to retain the vapour.  Fill to a few centimetres with a non-flammable solvent able to dissolve contaminants, boil to form a vapour 3 to 4 times heavier than air to fill the tank. Hot solvent vapour condenses on the cooler target parts at workplace temperature. The hot liquid solvent dissolves oil and grease and other contaminants. Used solvent returned to the sump revaporises continuing the cycle until parts have achieved the same temperature as the vapour when, with no further condensation, the process is complete. Simple but perfect. Highly productive and economical, parts removed from the cleaning process are clean, warm, and dry in 5 to 10 minutes.

cleaning tank Historically chlorinated hydrocarbons have been the solvents of choice for the “Condensation Cleaning” process. Compatible with most materials of manufacture, stable in constant use, producing a non-flammable saturated vapour heavier than air at a temperature greater than ambient.  In Europe, the United States and in other advanced industrialised economies increasingly stringent legislation to control emissions of VOCs, especially solvents, has led to new formulations for paints and other coatings where water replaces most of the solvent. In the early days the quality of water-based paints was not as good as traditional solvent-based coatings, but innovation has driven the development of new polymers with results as good as, if not better than, the solvent-based originals.

As with coatings, cleaning systems have had to change. With increasingly demanding standards of cleaning required for precision engineering, electronics, optics etc solvents are often first choice, for reasons outlined above, but these have been targeted by regulators and alternatives are encouraged by the relevant authorities and law makers often without serious consideration of unintended consequences. For example, water-based cleaning is encouraged as the obvious alternative, but this has many disadvantages compared to condensation cleaning as although the machines are simple and relatively cheap the processes require multiple heated tanks for immersion or spray processing or long programmed cycles in batch machines for cleaning, rinsing, and drying. Water based processes are slow, energy intensive and occupy more floor space than solvent-based condensation cleaning equivalents where only one tank with a small footprint is needed, delivering shorter process times and, most importantly for the environment, using minimal energy.

The ideal cleaning process would be “Condensation Cleaning” using water but due to the physical characteristics of the water vapour/steam and the inability to carry onto the surface of the targeted parts surfactants to remove the oil, grease and soils and the difficulty and expense of rinsing and especially drying this can only ever be a dream.

Historically chlorinated hydrocarbons have been the solvents of choice for the “Condensation Cleaning” process. Compatible with most materials of manufacture, stable in constant use, producing a non-flammable saturated vapour three to four heavier than air at a temperature greater than ambient.  The traditional solvents such as trichloroethylene exhibits all these characteristics however concerns about its carcinogenic properties and the danger to operators by exposure, led to a continuing search for a safer alternative. 1,1,1 trichloroethane based solvent formulations became popular in the mid part of the last century as a safer replacement. An excellent solvent, safer for users, it proved to be depleting the protective ozone layer around the Earth and was subsequently banned. With the development of the REACH legislation in Europe, trichloroethylene was again allowed with restrictions and stringent controls for use in authorised machines which control emissions to very low figures close to zero.

High performance vapour degreasing and cleaning  
EnviroTech Europe have been supplying vapour degreasing solvent formulations for 40 years constantly responding to increasingly stringent regulatory requirements for environmental and safety laws and the need for improved cleaning standards.   ProSolv® 5408e is a new sustainable solvent blend with near zero OPD (Ozone Depletion Potential) and GWP (Global Warming Potential) for high performance degreasing and cleaning which ticks all the boxes with the perfect profile for a vapour degreasing solvent. Soft on the environment and safer for users with high performance, improved cleaning, and lower costs. Lower boiling point, economical with energy with low solvent losses, faster production, reduced costs, easy handling. Exceptionally low surface tension to penetrate micron sized holes and close contact surfaces. Sustainable and secure for future use as your ‘forever solvent’.

ProSolv Benefits

Sealed Tanks
As with all legislation for chemical use regulation and restrictions drive development of associated processes and equipment. Sealed tanks are now standard with many different designs available. The most common are discussed below.

The single tank hermetically sealed machines favoured by some manufacturers uses a process tank to contain the solvent and a separate storage tank/vapour generator. Baskets loaded with parts to be cleaned are introduced from the top or through access points on the side of the tank. Lids or doors hermetically seal the tank. Solvent is pumped into the process tank where agitation, ultrasonics or pumped liquid is circulated through the parts. Used Solvent is removed to the vapour generator, condensing coils controlling the vapour are linked to coils located in the vapour zone which, when the cycle is complete, collapse the vapour.  The process tank is emptied. Controlled air introduced to process tank is then recycled through carbon absorption units to remove traces of solvent until the concentration is within regulatory standards when the lid is released for the basket of parts, clean and dry, to be removed and replaced with a further basket. Variations of process within the hermetically sealed tank are possible using sprays of cold or hot condensed solvent, immersion with or without ultrasonics and revolving baskets to cover most of the problems experienced when processing machined and fabricated parts. Continuous external distillation of the contents of the vapour generator is also an option depending on contamination.

The alternative technology is much simpler and uses well tried techniques not requiring the long recovery times of the hermetically vacuum sealed processes. The multilevel system uses a standard vapour degreasing tank design with a sealed loading section above the process tank. Components to be cleaned loaded in work baskets or jigs are fed to the load section by hand or conveyor, an internal platform raises and lowers the baskets in controlled cycles.

Loading complete – the load enclosure is sealed to completely isolate the process. Then seal on the process tank is opened and the basket automatically lowered into the cleaning section which can be simple condensation cleaning or immersion cleaning with or without ultrasonics or power sprays. Revolving baskets can also be added to improve cleaning in blind or through holes or oil ways in castings and fabrications.

On completion the basket rises to the area where the condensation coils are located, and parts allowed to drain and dry, basket raises into the load section when the process tank is sealed. A fan circulates air within the load area which can be recycled through carbon absorption systems if no external exhaust is preferred.

As baskets entering the loading space contain parts drained and dried only very small amounts of solvent are carried in the exhausted air which is monitored to ensure compliance with appropriate legislation. When this is complete the seal opens fully for removal of cleaned components. The loading section can be fitted with top or side seals allowing baskets to flow through on conveyor systems or be removed by hand or hoist. No solvent enters the work area. Both processes will produce parts cleaned to the highest standards but the choice of which offers the best solution needs a little more consideration.

The hermetically sealed vacuum process is complicated with the need to move liquids in the machine. It is relatively slow as the carbon adsorption process has to remove high levels of solvent from the recirculated airstream from the process tank. This is inefficient as adsorption rates for carbon fall rapidly with increasing saturation.  Final levels of solvent in the tank when the lid or loading door opens will be dragged into the workshop and the area where the operator is working. Long process cycles reduce throughput.

The simpler multilevel systems where movement of liquids is not required are more efficient and offer much faster process times.  Cost of manufacture is also reduced as no liquid movement or vacuum is involved. The extracted loading section ensures no leakage of solvent into the work area giving complete safety for operators and factory staff. Envirotech Europe also offers workplace air monitoring to ensure VOC’s from the solvent are within exposure limits and your machine is operating to specification.

Condensation cleaningConclusions
Both designs of process machines discussed above fully comply with the emission regulations of the EU and U.S authorities. Which to choose will depend on many factors which should be discussed with equipment and solvent suppliers who have the experience to advise on which offers the best process for the application. Equipment and solvent must work together, so it is advisable to ensure that the suppliers co-operate to offer a package with high levels of responsible care and product stewardship to ensure the best and safest installation. EnviroTech personnel and distributors are trained to work with equipment suppliers to advise on the use of ProSolv® 5408e vapour degreasing solvent for the most satisfactory outcome.

The “Condensation cleaning” process still gives the highest levels of economical cleaning with minimum energy usage, low footprint on the factory floor, safety for the operator, and high production rates with low solvent usage and environmental impact. With the new generation of sealed cleaning machines its future as the process of choice is assured.
Photograph of Solvac equipment courtesy of C&C Hydrosonics.

 

FURTHER INFORMATION
Please visit our website https://www.envirotech-europe.com/prosolv5408e for information about other uses and applications for ProSolv 5408e.

Visit www.envirotech-europe.com/applications-and-case-studies for information about uses and applications for all EnviroTech Europe products.

For more advice, please telephone us on +44 (0) 20 8281 6370 or use our website contact form.

All products are supplied and supported by EnviroTech Europe Ltd. Manufactured in the United Kingdom and available on short delivery times through our dedicated team of distributors worldwide.

Share this page:

Related Posts

Avionic and electronic component corrosion inhibitor

Avionic and electronic component<br />
corrosion inhibitor

SuperCORR A – Avionic and electronic component corrosion inhibitor

Super CORR A was originally developed for the U.S. Air Force to comply with Mil-DTL-87177B (formerly Mil-L-87177A) specifications. A water displacing lubricant and corrosion protection compound that prevents avionic as well as electrical and electronic components from systems failures caused by corrosion. It is now the industry standard for electrical corrosion protection, for in service maintenance by both military and commercial aircraft major repair and overhaul (MRO) facilities worldwide.

Super CORR A is a unique and proprietary formulation with long-lasting, anti-corrosion inhibitors and components providing a superior lubrication coefficient and protection against moisture, wear, general and fretting corrosion, static electricity, corona, and other electro migration problems. The non-flammable film is only 7 microns (0.007mm) in thick and is formulated without sulphates, chlorides, petroleum-based material, or halogens, to meet the EU RoHS directive.

Manufactured and supplied by EnviroTech Europe Ltd, it is unexcelled in preventing failures of electrical systems and electronic equipment caused by corrosion as well as preventing the corrosion of metal components surfaces, including those of components comprised of dissimilar metals such as those found in aerospace environments.

SuperCORR A - Corrosion Inhibitor

Super CORR A is packaged in aerosol cans make access to component parts easy for the engineering crew in difficult locations and conditions. Unpainted mild steel will not rust on exterior surfaces directly exposed to sea water environments for at least 6 months, protecting electrical connectors, switches, chains, drive shafts from corrosion while maintaining lubrication on moving surfaces.

Use Super CORR A  for protection and lubrication of connectors, electrical systems and switches and mechanical controls during servicing. The ability to displace water from exposed contacts can ensure reliable operation in extreme conditions all in one small aerosol can.

EFFICIENT AND ECONOMICAL

  • Extremely long-lasting, specially formulated and proprietary anti-corrosive inhibitor.
  • Eliminates premature failure of components created by moisture, general or fretting corrosion.
  • Prevents deterioration and contamination on all surfaces of electronic and electrical equipment and mechanical close tolerance moving components.
  • Reliability increased, maintenance intervals increased and costs reduced, manufacturers save costly warranty service calls or product re-call.

APPROVED

  • Industry approval from:  NASA, Boeing Aircraft, Bombardier, Embraer, Lear, Gulfstream, Hawker-Beechcraft, Cessna, Raytheon, Polish Airforce, Northrop-Grumman, Royal Navy and Royal Norwegian Air Force.
  • Exceeds Mil C 81309 Corrosion Prevention Compounds.
  • Approved in US Tri-Service Corrosion Manuals.

FURTHER INFORMATION
Please visit our website https://www.envirotech-europe.com/supercorr-a for  for information about other uses and applications for Super CORR A.

Visit www.envirotech-europe.com/applications-and-case-studies for information about uses and applications for all EnviroTech Europe products.

For more advice, please telephone us on +44 (0) 20 8281 6370 or use our website contact form. All products are supplied and supported by EnviroTech Europe Ltd. Manufactured in the United Kingdom and available on short delivery times through our dedicated team of distributors worldwide.

Share this page:

Video: ProSolv 5408e – Vapour degreasing cycle using hermetically sealed equipment

Vapour degreasing cycle using hermetically sealed equipment.

ProSolv 5408e is a high- performance solvent cleaner used for sustainable and future proof vapour degreasing.  Soft on the environment and safe for users, it offers improved cleaning at lower costs. Low boiling point, economical with energy with low solvent losses, faster production.

Innovation driven by legislation
Vapour degreasing, with or with-out ultrasonics, is the oldest, simplest and most effective solvent degreasing and metal cleaning process used today. It has, until recently, been subject to little change since it was first invented in the early part of the last century. In the UK, Europe, United States and other advanced industrialized economies increasingly stringent legislation to control emissions of VOCs, Solvents with a high Global Warming Potential (GWP), or a high Ozone Depletion Potential (ODP), and those compounds associated with human health concerns has led to Envirotech Europe manufacturing new formulations for precision cleaning solvents with low or near zero potential.​

Halogenated hydrocarbons are the solvents of choice for vapour degreasing and cleaning. The process is essentially simple. A tank with a sump to contain the solvent, heaters at the base and condensation coils around the top section to control the height of the vapour is all that is needed. When heated in the sump halogenated solvents produce, in most cases, a saturated vapour between 3 and 4 times heavier than air at a temperature greater than the ambient temperature of the parts to be cleaned. This allows the solvent vapour to condense on the surface of the parts. The condensate dissolves the contaminants such as oil, greases, flux, and soils returning the used solvent into the sump of the machine for recycling into vapour which continuously condenses onto the parts until they have achieved vapour temperature when, with no further condensation, the process is complete. Parts removed from the cleaning machines are very clean, warm and dry.

The most common halogenated solvents, in use for commercial purposes, are non-flammable so present no risk in this process. Perchloroethylene, used mainly for dry cleaning, methylene chloride previously used widely in paint strippers, 1,1,1- trichloroethane and trichloroethylene used for vapour degreasing were the original materials used based on chlorine chemistry. However continuing concern about the environmental impact and danger to operators by exposure to chlorine-based solvents, especially trichloroethylene, has led to a continuing search for safer alternatives, such as ProSolv 5408e , a trans-1,2-Dichloroethylene based solvent mixture that is non-flammable.

The ProSolv 5408e vapour degreasing process gives the highest levels of economical cleaning with minimum energy usage, low footprint on the factory floor, safety for the operator, and high production rates with low solvent usage or environmental impact. With the new generation of sealed cleaning machines its future as the process of choice is assured.

A more detailed version of this article can be viewed here:
https://www.vapour-degreasing.com/solvent-degreasing-and-metal-cleaning/

Animation of Solvac hermetically sealed equipment by kind permission of CC Hydrosonics Ltd. https://www.cchydrosonics.com/

FURTHER INFORMATION
For more advice, please telephone us on +44 (0) 20 8281 6370 or use our website contact form. All products are supplied and supported by EnviroTech Europe Ltd. Manufactured in the United Kingdom and available on short delivery times through our dedicated team of distributors worldwide.

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The best in vapour degreasing, corrosion protection, metal cleaning and surface treatment

EnviroTech Europe are specialists in metal, plastic and other substrate cleaning, pretreatment and protection.

We offer a range of approved products tailored to your industry, which are cost effective, energy efficient, safe for operators and the environment.

Our products are used in the following industries:

  • Electronics and Electrical
  • Environmental
  • General Cleaning
  • Industrial and Manufacturing
  • Marine and Maritime
  • Mechanical Engineering
  • Medical Device Manufacturing
  • Military
  • Motorsport
  • Power Generation
  • Railways and Automotive

PRODUCTS:

EnSolv CC-A Vapour Degreasing Solvents For Precision Metal Cleaning:
A family of environmentally friendly precision vapour degreasing and cleaning solvents for the aerospace, precision engineering, medical, optical and electronic industries. 

ProSolv 5408e Environmentally Sustainable High Performance Vapour Degreasing Solvent: 
Zero ODP (ozone depletion) and GWP (global warming potential) – Sustainable and secure for the future.

SuperCORR A Advanced lubricant and corrosion protection compound: 
Specialist barrier film corrosion protection products, based on synthetic materials to provide safe, effective, environmentally friendly solutions to lubrication and corrosion problems.

Aquus CL-One General Purpose Industrial Cleaning Agent: 
A non-toxic, water based surfactant system which exhibits a combination of characteristics not found in any comparable commercially available system.

Clarea Industrial Degreasing Solvents:
Non chlorinated, industrial wipe, brush, dip and immersion cleaning solvents for removing dirt, oil, grease and other contaminants without causing harm or leaving residue.

VOC Exposure Monitoring:
We have portable test equipment that logs the Volatile Organic Compound (VOC’s) content in the air from various strategic positions around your degreasing equipment, including the operator position

FURTHER INFORMATION
For more advice, please telephone us on +44 (0) 20 8281 6370 or use our website contact form. All products are supplied and supported by EnviroTech Europe Ltd. Manufactured in the United Kingdom and available on short delivery times through our dedicated team of distributors worldwide.

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Industrial solvent cleaners

Clarea® general purpose industrial solvent cleaners are safe for users and the environment

industrial solvent cleaners

Clarea® non-chlorinated industrial solvent cleaners are compatible with all metals, composites and most plastics used to remove dirt, oil, grease, or other contaminants from surfaces without causing harm or leaving residue. They are used as immersion cleaners for component cleaning in manufacturing and engineering industries and as wipe cleaners for large surface areas prior to painting or powder coating. The environmental concerns and health hazards of the chlorinated solvents used as industrial degreasing agents has led to the formulation of this EnviroTech range of safer cleaning solvents.

What to consider when choosing suitable solvent cleaning products?

Solvents used for cleaning must be highly refined and leave no residues on drying. They need to be highly effective removing oils and soils without causing damage or corrosion of the parts or components being processed and leave minimal residues.

Cleaning specifications vary widely from very demanding automotive and aerospace applications to less demanding applications where critical cleaning is not needed such as pre-used parts or assemblies from the transportation, aerospace, or manufacturing equipment sectors. Heavily contaminated when removed from service these must be free of oils, soils, grease and dirt before disassembly prior to refurbishing and rebuilding. Much of this work will be manual and the considerations for the safety of operators, hand wiping or brush cleaning is paramount.

Clarea® products are aliphatic hydrocarbon based low odour degreasing solvents with specified flash points. They will remove oils, greases, hydraulic fluids cutting fluids and a wide variety of hydrocarbon based protective coatings. Clarea® solvents can be safely used with all metals and composites and most plastic and paint finishes.

Clarea® HC40 is low odour degreasing fast drying solvent with a flash point of 40°C. It is suitable for ultrasonic and dip systems and can be used with brush or in hand-wipe processes.

Clarea® HC462
is a degreasing solvent with a flash point over 60°C. It is suitable for hand-wipe applications when used externally.

EFFICIENT AND ECONOMICAL

  • Versatile and cost-effective solutions for all your industrial cleaning
  • Minimal odour and low toxicity for operators
  • Multipurpose uses can reduce the inventory of cleaning fluids.
  • Flexible uses – evaporation rates suitable for hand wipe, spray, or immersion tank cleaning
  • Clarea HC40 for brush and hand wiping, air dries. Flash point 40°C
  • Clarea HC62 for spray or immersion cleaning Flash point 62°C
  • Contains no chlorine, other halogens or stabilisers
  • Compatible with all metals and composites and most plastics
  • Excellent pre-cleaner for paint or powder coatings
  • Safe, reliable, environmentally friendly cleaning

We can provide you with a Material Safety Data Sheets, independent laboratory reports, product samples and technical assistance..

For more information or advice please telephone us on +44 (0) 20 8281 6370 or use our contact form.

All of our products are manufactured, supplied and supported by EnviroTech Europe Ltd and are available on short delivery times through our dedicated team of distributors worldwide.

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https://www.envirotech-europe.com/mh370/

Solvent Cleaner For Electronics

solvent cleaner for electronics

High performance solvent cleaner for electronics and electrical components

Evolving legislation by governments worldwide has resulted in the need for new and original formulations to be offered for use in solvent cleaning and vapour degreasing processes. Companies must continue to comply with legislation for protection of the environment and safety of operators who may be exposed to harmful substances. In applications where formulated blends of halogenated solvents have been used very effectively in the past, these are now required by changes in legislation to be phased out of use.

With a wealth of experience in this field, EnviroTech Europe have developed a new solvent cleaning formulation based on recent research, a replacement for the “old” technology, which has been found to perform just as effectively without the negative environmental, health and safety issues.

Near Zero OPD and GWP solvent blend for high performance vapour degreasing solvent cleaner

ProSolv 5408e is the perfect replacement for trichloroethylene, nPB (n-propyl bromide), perchloroethylene or other flammable solvents used in general engineering cleaning processes.

ProSolv 5408e is a high-performance solvent cleaner used for sustainable and future proof vapour degreasing. Soft on the environment and safe for users, it offers improved cleaning at lower costs. Non-carcinogenic, low boiling point, economical with energy with low solvent losses, faster production, reduced costs, easy handling.

ProSolv 5408e has been developed to provide superior critical cleaning performance for manufacturers of electronic and electrical components. High Solvency (KB Value 98) for removal of organic residues, compatible with organic and synthetic oils and most plastics and metals,
non-flammable, with low ozone depletion (ODP) and global warming potential (GWP).

ProSolv Benefits

Listed above are some of the benefits from using ProSolv 5408e, a sustainable vapour degreasing solvent for cleaning and defluxing in the electronics and electrical components industry and an economical and efficient replacement solution for vapour / vapour liquid cleaning systems using older legacy solvents, which are now either banned or being phased out. EnviroTech Europe have many years of experience and our experts are available to guide you through your solvent cleaner changeover procedures or to advise on equipment.

FURTHER INFORMATION
Please visit our website www.envirotech-europe.com for information about other uses and applications for our vapour degreasing and cleaning products.

Visit www.envirotech-europe.com/applications-and-case-studies for information about uses and applications for all EnviroTech Europe products.

For more advice, please telephone us on +44 (0) 20 8281 6370 or use our contact form. All products are supplied and supported by EnviroTech Europe Ltd. Manufactured in the United Kingdom and available on short delivery times through our dedicated team of distributors worldwide.

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Solvent Degreasing and Metal Cleaning

Solvent Degreasing and Metal Cleaning

Solvent Degreasing and Metal Cleaning –
Future proof Vapour Degreasing from EnviroTech Europe

Innovation driven by legislation

Vapour degreasing, with or with-out ultrasonics, is the oldest, simplest and most effective solvent degreasing and metal cleaning process used today. It has, until recently, been subject to little change since it was first invented in the early part of the last century. In the UK, Europe, United States and other advanced industrialized economies increasingly stringent legislation to control emissions of VOCs, Global Warming Compounds, Ozone Depleting Compounds, and those compounds associated with human health concerns has led to new formulations for precision cleaning solvents.

Cleaning systems have had to change too. With increased legislation concerning the regulation of health and environmental safety, uses of solvents have been targeted and alternatives are encouraged by the relevant authorities and law makers, often without serious consideration of unintended consequences. For example, water-based cleaning is the obvious alternative but this has many disadvantages compared to vapour degreasing as although the machines are simple and relatively cheap the processes require multiple tanks for immersion or spray processing or long programmed cycles in batch machines for cleaning, rinsing and drying. Water based processes are slow, energy intensive and occupy more floor space than vapour degreasing equivalent where only one tank with small footprint is needed delivering shorter process times and most importantly using minimal energy. Then there is the disposal concern as the used water cannot just be disposed of by pouring it down a drain.

The ideal cleaning process would be vapour degreasing and cleaning with water, but due to the physical characteristics of the vapour/steam and the inability to carry surfactants to remove the oil, grease and soils and the difficulty of rinsing and especially drying this will only ever be a dream.

Halogenated hydrocarbons are the solvents of choice for vapour degreasing and cleaning. The process is essentially simple. A tank with a sump to contain the solvent, heaters at the base and condensation coils around the top section to control the height of the vapour is all that is needed. When heated in the sump halogenated solvents produce, in most cases, a saturated vapour between 3 and 4 times heavier than air at a temperature greater than the ambient temperature of the parts to be cleaned. This allows the solvent vapour to condense on the surface of the parts. The condensate dissolves the contaminants such as oil, greases, flux, and soils returning the used solvent into the sump of the machine for recycling into vapour which continuously condenses onto the parts until they have achieved vapour temperature when, with no further condensation, the process is complete. Parts removed from the cleaning machines are very clean, warm and dry.

The most common halogenated solvents, in use for commercial purposes, are non-flammable so present no risk in this process. Perchloroethylene, used mainly for dry cleaning, methylene chloride previously used widely in paint strippers, 1,1,1- trichloroethane and trichloroethylene used for vapour degreasing were the original materials used based on chlorine chemistry. However continuing concern about the environmental impact and danger to operators by exposure to chlorine-based solvents, especially trichloroethylene, has led to a continuing search for safer alternatives, such as ProSolv 5408e, a trans-1,2-Dichloroethylene based solvent mixture that is non-flammable.

As with all legislation for chemical use regulation and restrictions drive development of associated processes and equipment. The most important developments in vapour degreasing cleaning machines to use solvents for vapour degreasing use two different approaches and raise difficult questions as to which is the best most economical and simplest in use.

The single tank hermetically sealed machines favoured by mainly German manufacturers uses a process tank to contain the solvent and a separate storage tank/vapour generator. Baskets with parts to be cleaned are loaded from the top and lowered into the process tank. A lid then closes over the tank and is hermetically sealed. Solvent is pumped into the process tank. Baskets are immersed in the solvent where agitation, ultrasonics or pumped liquid is circulated through the parts. When the immersion process is complete solvent is pumped to the storage tank and vapour fed to the process tank from a vapour generator for rinsing and drying. Condensing coils/panels controlling the vapour height are linked to coils located within the vapour zone which, when the cycle is complete, collapse the vapour. The process tank is emptied. The saturated air/solvent from the process tank is then recycled through carbon absorption units to remove traces of solvent from the air until the concentration is below 2 grams per cubic meter when the lid opens automatically for the basket of parts, clean and dry, to be removed and replaced with a further basket.

Variations within the hermetically sealed tank are possible using sprays of cold or hot condensed solvent, immersion with or without ultrasonics and revolving baskets to cover most of the problems experienced when processing machined and fabricated parts. Continuous external distillation of the contents of the vapour generator is also an option depending on contamination.

The alternative technology is much simpler and cheaper and less time consuming using well trained techniques. This is favoured by UK based manufacturers. The multilevel system shown in the diagram uses a standard vapour degreasing tank design with a sealed loading section above the process tank.

Work baskets are fed to the load section from a hoist or conveyor. The loading door is then pneumatically sealed to hermetically isolate the process. The sealing lid on the process tank is opened and the basket lowered into the cleaning tank which can be simple vapour degreasing with vapour generator below or an offset generator can be used with the lower section being filled with clean solvent for immersion cleaning with or without ultrasonics or power sprays. Revolving baskets can also be added to improve cleaning in blind or through holes or oil ways in castings and fabrications.

When the process is complete the basket rises to the freeboard area where the condensation coils are located, and parts are allowed to drain and dry. The tank seal opens to allow the basket into the load section while the lid closes again across the process tank. A fan is then activated which produces a negative vacuum in the load area. The loading door is then partially opened to allow a flow of air through the loading section which is exhausted to atmosphere or can be recycled through carbon absorption systems if no external exhaust is preferred. As baskets entering the loading space contain parts drained and dried only very small amounts of solvent are carried in the exhausted air which is monitored to ensure compliance with local legislation. When this is achieved the door opens fully for removal of basket. The loading section can be fitted with top or side sealed doors allowing baskets to flow through on conveyor systems or be loaded from hoists. No solvent enters the work area. Both processes will produce parts cleaned to the highest standards but the choice of which offers the best solution needs a little more consideration.

The single tank process is complicated with the need to move liquids in the machine. It is relatively slow as the carbon adsorption process needs to remove high levels of solvent from the recirculated airstream from the process tank. This is inefficient as adsorption rates for carbon fall rapidly with increasing saturation. Final levels of solvent in the tank when the lid opens will be dragged into the workshop and the area in which the operator is working. Long process cycles reduce throughput.

The simpler multilevel systems where movement of liquids is not required are more efficient and offer much faster process times. Cost of manufacture is also cheaper as no liquid movement is involved. The extracted loading section ensures no leakage of solvent into the work area which offers complete safety for operators and factory staff. The disadvantage of the multilevel machine is the height of the equipment compared to the single tank machine. This will often require the equipment be installed in a pit for easy access.

Both designs of process machines fully comply with the emission regulations of the UK, EU and U.S authorities. Which to choose will depend on many factors which should be discussed with both the equipment and solvent suppliers who have the experience to advise on which offers the best process for the application. Equipment and solvent must work together and it is advisable to ensure that the suppliers work closely together to offer a package with high levels of responsible care and product stewardship to ensure the best and safest installation.

The vapour cleaning process still gives the highest levels of economical cleaning with minimum energy usage, low footprint on the factory floor, safety for the operator, and high production rates with low solvent usage or environmental impact. With the new generation of sealed cleaning machines its future as the process of choice is assured.

Envirotech Europe supplies three distinct products that use this process and we are happy to advise you on the best solution to suit your needs.  Please visit our website to find out more about  ProSolv 5408e,  ProSolv  and  EnSolv® CC-A.

Image of Solvac hermetically sealed equipment by kind permission of CC Hydrosonics Ltd.

FURTHER INFORMATION
Please visit our website www.envirotech-europe.com for information about other uses and applications for our vapour degreasing and cleaning products.

Visit www.envirotech-europe.com/applications-and-case-studies for information about uses and applications for all EnviroTech Europe products.

For more advice, please telephone us on +44 (0) 20 8281 6370 or use our contact form. All products are supplied and supported by EnviroTech Europe Ltd. Manufactured in the United Kingdom and available on short delivery times through our dedicated team of distributors worldwide.

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Electrical corrosion protection

Electrical corrosion protection

Electrical corrosion protection – Prevent hydrogen sulphide corrosion in electrical and electronic equipment

Super CORR A is a proven and cost-effective way to prevent or inhibit corrosion from destroying electronics and electrical components. Adverse work environments where corrosive gases such as hydrogen sulphide are found, can cause severe corrosion and rapid deterioration of electronic components and equipment, including connectors and switches.

Lost productivity and revenue caused by plant and equipment downtime
Corrosion, in its many forms, costs both private and public sectors hundreds of billions of Euros a year to repair or replace electrical, electronics, or avionic components because of failures caused by corrosion. While all metals corrode, due to a number of different factors, there is no simple or single solution to the overall corrosion problem. However there are some very cost effective and proven ways to prevent corrosion and failures caused by corrosion and thereby reducing or eliminating associated costs and increasing safety which should be foremost in the mind set of any preventative maintenance programme manager.

Super CORR Awas specifically designed to lubricate and prevent corrosion in electrical fittings and connectors; electrical and avionic harness assemblies and connectors; electrical and electronic switches; close tolerance and dissimilar metal components; lighting connectors and sockets. A unique non-flammable “self-healing” ultra-thin film lubricant with a proprietary corrosion preventive compound that will not harden or crack, is not a wax or oil-based product and is formulated without sulphates, chlorides or halogens.

Super CORR A inhibits corrosion caused by exposure to both fresh and salt water moisture as well as the corrosive vapours from Sulphur dioxide (SO2), Nitrogen dioxide (NO2), Hydrogen Sulphide (H2S), Ammonia (NH3), and Chlorine (CL12) based gases found in waste water and sewer treatment plants, pulp and paper mills and plants, chemical and petroleum plants, maritime industry, aircraft/airline industry, military equipment including ships, aircraft, and rolling stock, auto industry, farming and agriculture industry, and the list goes on.  

Super CORR A extends the working life of electrical components and systems and other critical items by preventing the deterioration and/or failure caused by corrosion and can significantly reduce downtime, operating and maintenance costs as well as enhance safety. An ultra-thin film, water displacing lubricant and corrosion inhibiting compound Super CORR A has undergone extensive testing by Battelle Labs as well as the U.S. Air Force and meets MIL-DTL-87177B (revised MIL-L-87177A) specification. SuperCORR-A is used by NATO (NATO NSN  8030-99-226-6966) to protect avionic, electrical, electronics, electrical switches and connectors and components from corrosion in both the military and civilian aircraft. Savings for the U.S. government alone is estimated to be in excess of $50 million per year.

Super CORR Aprovides a superior lubrication coefficient and protects components against moisture, wear, general and fretting corrosion, surface static electricity, corona, and other electromigration problems. The super thin non-flammable lubricant film is only 7 microns (0.00028 inch) thick and is formulated to meet the RoHS directive. It is unexcelled in preventing deterioration and contamination on all surfaces of electronic equipment.

The question for you is: What is the cost of NOT using Super CORR A in your preventative maintenance programme?

FURTHER INFORMATION
Please visit our website https://www.envirotech-europe.com/supercorr-a for  for information about other uses and applications for Super CORR A.

Visit www.envirotech-europe.com/applications-and-case-studies for information about uses and applications for all EnviroTech Europe products.

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