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A Complete Range Of Metal Cleaning And Surface Treatment Solutions

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Critical cleaning of electronics and electrical components

ProSolv® 5408 new sustainable solvent for critical cleaning of electronics and electrical components

critical cleaning of electronic components

Solvents are used throughout industries where extremely high performance and safety critical cleaning levels are required including aerospace, military and defence, electronics, semiconductor manufacturing, optics, and industrial machining.

ProSolv 5408e is an innovative contemporary highly effective, versatile defluxer developed to not only remove rosin flux, no-clean flux, oil, grease and wax contaminants, but also to eliminate residual halide salts, ions and other polar and non-polar soils and contaminants that often cause component failures with tracking and other issues impacting performance.

Solvents based on conventional chlorinated hydrocarbons have delivered the high standards required for critical cleaning in the past. These chemicals had desirable properties which when combined gave a profile which was perfect for vapour/vapour liquid degreasing when combined with suitable equipment as industrial cleaning systems.

Non-flammable, consistent azeotropes, low viscosity, high liquid density, very low surface tension, and effective wetting enabling them to penetrate tight spaces for optimum cleaning performance. High KB values allows for cleaning a variety of light and heavy soils including particulates, ionic soils, oils, waxes, and greases these are no longer acceptable.

Evolving legislation for ecodevelopment demanded by governments worldwide demand inventive and original formulations for the use of solvents to continue to comply with the increasingly stringent legislation for protection of the environment and, even more importantly, safety of operators who maybe exposed to the products. 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 their 25 years wealth of experience in this field as the inventors of the highly regarded n propyl bromide (nPB) based EnSolv range of precision cleaning solvents EnviroTech Europe created a contemporary new formulation based on recent research and developed a new solvent as a replacement for the “old” technology which has been found to perform just as effectively, but without the negative environmental, health and safety issues.

ProSolv Benefits

Listed above are just some of the benefits from using ProSolv 5408e, your forever sustainable solvent for cleaning and defluxing in the electronics and electrical components industry and an economical and efficient “drop in “for vapour / vapour liquid cleaning systems using legacy solvents. EnviroTech experts with many years of experience are available to guide you through changeover procedures or to advise on equipment.

For full product information please visit www.vapour-degreasing.com/prosolv5408e

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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Medical Device Cleaning

ProSolv® 5408 high performance vapour degreasing solvent for medical device cleaning

Medical Device Cleaning

Medical device cleaning

Critical cleaning is vital throughout the medical supply industry for safe, successful operations and procedures. Manufacturers of medical instruments, implants and other devices using metals, glass, ceramics and plastics must select a cleaning processes compatible with all these materials of construction, to remove oils and other contaminants from the manufacturing processes. The cleaning system must be proven to be safety critical and to leave no residues on the surfaces of the cleaned parts.

In this short article we discuss the benefits of condensation cleaning with ProSolv 5408e vapour degreasing solvent for medical device cleaning compared to water-based cleaning.

Water based cleaning options

Formulations for water based cleaners use combinations of surfactants to reduce the very high surface tension of water to allow penetration of the cleaning solution into minutes holes and very fine mechanical clearances. The solutions must solubilise oils, greases, cutting fluids, grinding and buffing compounds and remove particulate soils. Biocides are also present in these formulations to ensure no bioburden is carried over from the cleaning process.

After cleaning residues of chemicals must be removed or they may be a source of corrosion when the devices are in use. Multiple rinses in hot and cold de-ionised water using agitation of baskets or carriers or ultrasound to dilute and displace the cleaning liquids retained in minute holes, cavities and trapped between close tolerance metal surfaces.

Continuous production of high-quality deionised rinse water is extremely expensive, but the drying process is even more costly and environmentally challenging. Multiple cleaning and rinse tanks and drying ovens or tunnels need a lot of space and energy. Further controlled conditions are needed to cool parts after drying to prevent condensation of moisture, which can be growth media for bacteria, on the critically clean surfaces, before packing in sterile bags and containers for storage or shipping.

High output water based cleaning equipment can use conveyorised high pressure targeted spray tunnels for automated high-volume production with integrated “blow off” drying and conditioning tunnels.

For smaller scale operations systems are available using baskets in single cell dishwasher type equipment or open tanks. The latter can use manual or automated handling to progress baskets through the cleaning cycle using similar aqueous based chemical formulations with multiple deionised water rinses and a separate drying oven. These systems can process several baskets or carriers at a time so are only suitable for small batch production. In either case long process times will determine the size and complexity of installations.

Compare the complications of water-based processing to the simplicity and speed of vapour degreasing using ProSolv® 5408e solvents

Vapour degreasing or more properly condensation cleaning, is a proven process where a non-flammable halogenated solvent, safe for people and the environment is heated in the sump of a tank. Boiling solvent produces a dense vapour which is contained by condensation coils around the inner surfaces at the top of the tank. Solvent condensed on the coils is returned to the sump for reuse in a closed cycle.

Parts to be cleaned at ambient temperature are immersed in the vapour which condenses as solvent on the surfaces of the devices or parts in a continuous stream of perfectly clean solvent until the surfaces reaches vapour temperature when condensation ceases. Vapour degreasing uses only one tank with one liquid. Parts are cleaned, rinsed and dry in 3 to 5 minutes with parts hand hot ready for further processing, storage or packing into sterile packs for shipping.

ProSolv 5408e solvents were developed to provide superior critical cleaning performance for manufacturers of medical devices and equipment. The solvent is stable when used for vapour degreasing or cold dip cleaning and compatible with metals, including titanium, ceramics, glass and most plastics used in producing orthopaedic implants, dental, ophthalmic and surgical tools, lenses etc. ProSolv 5408e is a cost effective and sustainable solution to remove polar and non-polar soils and other contaminants and sets the standard for removal of machining and cutting oils, coolants, greases, grinding, buffing and polishing compounds, while leaving no residue.

Vapour degreasing and dip cleaning with ProSolv 5408e is a very effective steriliser of microbial contaminants. Exposing the microorganisms, which have cell walls made up of organic materials including lipids (Fats), to a powerful solvent is a very efficient disruptor of the cell walls. Once compromised the organism’s inner workings lose this protection and the organism dies reducing the bioburden.

ProSolv 5408e is also an excellent solvent carrier for organic or synthetic medical lubricant. This application for coating needles, cannulas and instruments needs consistent quality and evaporation rate to produce, comfortable, pain free insertion for patients.

In many medical applications oxygen and gas supply systems are needed and cleaning at installation and when extensions of pipework and fittings are added is vital for safety. ProSolv 5408e removes oil and organics leaving residue free, dry surfaces to standards approved by gas supply companies, and is compatible with all metals.

Clearly solvent cleaning and vapour degreasing with ProSolv 5408e is a better choice than water cleaning. Faster throughput, lower costs and sustainability to meet the unique challenges in achieving the high standards demanded for medical device manufacturing.

ProSolv 5408e is manufactured in UK with excellent customer service, technical support and training from qualified distributors throughout Europe.

For full product information please visit www.vapour-degreasing.com/prosolv-medical

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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SuperCORR A protection for USB contacts

protect USB contacts

SuperCORR A protects and lubricates contacts on the new Charge / Sync Cable from Lifedge

SuperCORR A lubricant and protective coating widely used by the military, electronics and aerospace industries for critical applications is used to protect contacts on the Lifedge lightning connector to USB cable to offer the protection needed in extreme conditions.

SuperCORR A deposits a dry protective film with excellent corrosion protection and lubricant properties plus the added advantage of a hydrophobic surface rejecting water that ensures the easiest and best connection for the very close spaced connectors. 

Lifedge is the world’s first 100% waterproof, rugged Lightning to USB cable for charging and mobile connections whatever the weather or conditions. Developed for use in all outdoor activities including sailing, hiking, military, naval, surveying or other challenging uses. With an ultra-durable outer coating that will never fray and double-moulded, super-tough plugs, charging, downloading and data transfer is improved even in the most extreme and difficult conditions.

During the design of this new cable an extensive test programme, by Scanstrut, manufacturer of the Lifedge cable, was carried out to ensure the contacts were protected from corrosion in the salty and hostile environments in which the Lifedge connectors are used.

SuperCORR A dry lubricant widely used for critical applications in military, electronics and avionics industries proved to offer the protection needed. SuperCORR A prevents or delays corrosion and possible failures.

Testing by a major electronics connector manufacturer recognized that SuperCORR A is a lubricant formulated with corrosion preventive compounds, and as is the case with all “lubricants” will be worn off over time. SuperCORR A was tested to see what the “life” of the lubricant was in a “rub test”. The typical test is 20,000 cycles, i.e. unplug/plug in is one cycle. The test results demonstrated that after 20,000 cycles there were no failures. It was decided to take it one more step and run the same tests for 200,000 cycles. The results again showed no indications of galling or scoring on the USB connectors which looked and performed as good as new.

The extensive testing during the design of the Lifedge connectors validated the original tests and confirmed SuperCORR A will ensure the customer has the most reliable and easy to use connector, in often demanding circumstances. The robust Lightning and USB metal connectors are coated with SuperCORR A patented anticorrosion treatment for complete protection against the elements, whilst an integrated O-ring ensures IP66 waterproofing when charging with the Lifedge iPhone case. The cable is also compatible with protective cases from other leading manufacturers. Officially approved by Apple for use with iPhone, iPad and iPods SuperCORR A helps to bring new freedom and reliability with the Lifedge Ultimate Charge/ Sync Cable.

SuperCORR A is available as an aerosol spray and in bulk containers for brush and dip coating.

Corrosion protection

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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Latest News

Replace Toxic Solvents For Industrial Cleaning

Use Clarea degreasers to replace toxic solvents
for industrial cleaning

Clarea solvent degreasers are a newly formulated range of highly refined hydrocarbon based degreasing solvents with very high cleaning power and low odour, which can be used as an alternative to other hazardous solvents used throughout industry to remove oils, greases, hydraulic fluids cutting fluids and a wide variety of hydrocarbon based protective coatings.

Clarea solvents can be used in dip, brush or in hand-wipe applications.

Clarea HC40 has a relatively fast evaporation rate with low odour and is suited to hand wipe and brush cleaning and air dries while Clarea HC62 is not classified as flammable and is typically used with immersion dip and soak tanks for heavily contaminated parts where oven or forced air drying is acceptable.

Clarea solvents leave minimal residues on drying and are compatible with all metals and many plastics and composite materials. Clarea degreasing solvents can reduce usage and contain no halogens such as chlorine or fluorine so do not deplete the ozone layer or contribute to global warming.

Clarea solvents are one of the ranges of solvent based cleaners and surface treatment products from cleaning specialists EnviroTech Europe Ltd.

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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SuperCORR A Protects From Corrosion


Super
CORR
A maintains performance of thinner gold plating used on electrical contacts to protect from corrosion.

SuperCORR A ultra-thin film dry lubricant prevents galling corrosion caused by vibration on printed circuit leads and connectors.

Advances in gold plating technology allows manufacturers to reduce plating thickness on the substrate metal used for contacts in electrical connectors.

The thickness of gold plating is decreasing and becoming thinner over time which reduces manufacturing costs as gold becomes increasingly expensive.

Reducing thickness of gold plating however can result in failures caused by corrosion. Minute irregularities in the surface of the connector’s base metal leads to irregular or uneven wear causing the “high spots” on the contacts to wear through the gold plating. Using SuperCORR A aerosols prevents or delays corrosion and subsequent failures.

TESTING SuperCORR A IN CONNECTOR “RUB TEST”.

SuperCORR A is a lubricant containing corrosion preventive compounds, and as is the case with all lubricants they will be worn off over time. A manufacturer of connectors tested SuperCORR A to see what the “life” of the lubricant was in a “rub test”. The typical test is 20,000 cycles, i.e. unplug, plug in is one cycle. The test results demonstrated that after 20,000 cycles there were no failures.

It was decided to take it one more step and run the same tests for 200,000 cycles. The results again showed no indications of galling or scoring on the USB connectors. The USB connector looked and tested as good as new.

MILITARY USES OF SuperCORR A

As it is compliant with Mil-L-87177A specifications SuperCORR A is used by the U.S. Air Force to protect the intricate workings of the F-16 Fighter Jet and by the U.S. Navy on the P 3 Orion electronic surveillance aircraft. Savings for the U.S. government is estimated at $50 million per year. Commercial Aviation aircraft manufacturers recommend it for electrical and close mechanical application, especially where flights are in salt fog or high humidity.

Containing extremely long-lasting, proprietary anti-corrosive inhibitors SuperCORR A provides a superior lubrication coefficient and protects components against moisture, wear, general and fretting corrosion, surface static electricity, corona, and other electro migration problems. The ultra-thin, non-flammable lubricant film is only 7 microns (0.0007 inch) thick and is formulated without sulphates, chlorides or halogens to meet the EU RoHS directive. It is unexcelled in preventing deterioration and contamination on all surfaces of electronic equipment.

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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SuperCORR A Cleans And Protects Electrical Connections

SuperCORR A aerosols clean and protect electrical connections on mobile generators during aircraft ground services.

Clean And Protect Electrical Connections


Super
CORR
A aerosols clean and protect electrical connections on mobile generators during aircraft ground services.

Aircraft ground services operate in extreme and often hostile weather environments. Mobile generators connect and disconnect many times a day often in extreme weather conditions. Each disconnection can allow dust or rain water onto the electrical connections. SuperCORR A aerosol cleans, dries, lubricates and protects electrical connections on site ensuring uninterrupted service.  

Mobile generators are used throughout the world by extraction industries and manufacturing plants in remote and hostile locations for essential power production. Dusty and wet environments in deserts, mines, grinding mills, pulp and paper mills and on land or sea drilling rigs for gas and oil production. Generators powering aircraft services while stationary connect and disconnect many times a day in extreme conditions. The flexing of the connecting cables allows sufficient movement between the metal surfaces of the connecting pins to produce fretting corrosion which reduces, interrupts or produces failures in supply.

SuperCORR A is an aerosol lubricant containing corrosion preventive compounds, and, as is the case with all lubricants, they can be worn off over time. A manufacturer of connectors tested SuperCORR A  to see what the “life” of the lubricant was in a “rub test”. The typical test is 20,000 cycles, i.e. unplug, plug in is one cycle. The test results demonstrated that after 20,000 cycles there were no failures. It was decided to take it one more step and run the same tests for 200,000 cycles. The results again showed no indications of galling or scoring on the connectors at all. The connector looked and tested as good as new. This test was run under clean conditions in a laboratory but demonstrates the effectiveness of the protective lubricant in SuperCORR A . As it meets Mil-DLT-87177B specifications it is used by the U.S. Air Force to protect the intricate workings of the F-16 and F-15 fighter jets and by the U.S. Navy on the P 3 Orion electronic surveillance aircraft. Savings for the U.S. government is estimated at $50 million per year. Commercial Aviation aircraft manufacturers recommend it for avionics and electrical switches and connectors and close mechanical application, especially where flights are in salt fog or high humidity.

Containing extremely long-lasting, proprietary anti-corrosive inhibitors, SuperCORR A provides a superior lubrication coefficient and protects components against moisture, wear, general and fretting corrosion, surface static electricity, corona, and other electro migration problems. The super thin non-flammable lubricant film is only 7 microns (0.0007 inch) thick and is formulated without sulphates, chlorides or halogens to meet the RoHS directive. It is unexcelled in preventing deterioration and contamination on all surfaces of electronic equipment.

Very fast drying environmentally acceptable solvents are used as carriers and propellants which will not affect most plastics, substrates, metals or other materials used in connector manufacture. The aerosols are supplied with probes which allow access to pins and connector tubes where the low surface tension repels water, dirt dust and metal particles from blind holes and surfaces to produce thoroughly clean holes and surfaces before a second application applies the lubricant film. Reconnection to the supply with cleaned sections of the connector ensures reliable operation even in the most testing of environments. This easy maintenance from one can of SuperCORR A allows this essential task to be carried out in any conditions quickly, easily and securely.

For more information visit:

https://www.corrosion-protect.com/applications/aerospace-and-aircraft-corrosion/

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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Eco Friendly Industrial Solvent Cleaners

Clarea Solvent Cleaners

Eco Friendly Industrial Solvent Cleaners, Safe for Users and the Environment.

Cleaning solvents are used in many industries to remove dirt, oil, grease, or other contaminants from machined and fabricated metal, plastic and composite surfaces. Due consideration must be given to the effects on users and the environment.  Some of the benefits of using Clarea solvents for these applications are discussed in this article.

Solvents used for cleaning must be highly refined and leave no residues on drying. They have to be very effective in removal of oils and soils without causing damage or corrosion of the parts or components being cleaned and leave minimal residues which will be the result of process design. Cleaning to remove process oils and particles can use single or multitank spray washers or immersion tanks with ultrasonics or agitation depending on the volume of components and cleaning specifications. These vary widely from very demanding automotive and aerospace applications to less demanding applications where critical cleaning is not a requirement.

Pre-used parts or assemblies from the transportation, aerospace or manufacturing equipment sectors are often very heavily contaminated when removed from service but must be free of these oils, soils, grease, dirt and contaminants before handling to disassemble 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. Provision of personal protection equipment (PPE) such as gloves, overalls, safety glasses and possibly masks must be carefully considered to be sure the PPEs are compatible with the solvents.

Among other considerations are the working space where the cleaning applications are to be carried out. Flammability versus drying time is always an issue. It is preferable to use a slower drying high flash point solvent in enclosed areas. Good ventilation with a high extraction rate of air will assist drying. In enclosed machines with automatic handling a positive extraction rate of air and heated and extracted final tank can lower process times. Flame proofing requirements and the insurance implications of the faster drying times of more volatile flammable solvents is often mitigated by the use of less volatile, lower VOC materials by design of machines and careful consideration of costs which these solvents offer in lower usage and longer tank life with much lower disposal costs of used materials.

The growing concerns regarding environmental and health hazards of the most commonly used chlorinated solvents for industrial degreasing and cleaning has led to the formulation by EnviroTech Europe of the Clarea range of safer cleaning solvents.

Clarea solvents can be used for spray or immersion cleaning for very heavy soiling or in multitank processes to meet the highest standards demanded for critical cleaning. They can be used as wipe or brush cleaners for large surface areas prior to painting or powder coating.

Why should you choose Clarea industrial cleaning solvents.

The solvents applied during production or finishing processes have a direct effect on the health of workers and the environment. Volatile organic compounds or VOCs are chemicals which vaporise at room temperatures. Traditional solvents used for cleaning have low boiling points and a high VOCs making them harmful to use and less eco-friendly Exposure to the VOC’s released by these cleaning agents must be controlled to prevent respiratory, allergic, and immune system complications for users. If your company uses industrial degreasing agents regularly, it is time to evaluate the implications of this choice.

Clarea is a less volatile alternative than conventional cleaners. Highly refined aliphatic hydrocarbons with minimal residues and tight vaporisation ranges are capable of providing the same results and can be substituted to create a safer, sustainable, eco-friendly workplace. The low odour, low flammability and low toxicity of Clarea solvents provides performance and operator and environmental acceptability using less material at lower costs. Multipurpose use can reduce the inventory of cleaning fluids stocked.

Clarea® HC40 for brush and hand wiping, air dries. Flash point 40℃.

Clarea® HC62  for dip cleaning with agitation or ultrasonics. Low evaporation. Non-flammable.

The Clarea range of solvents is supplied through our distributors worldwide who can supply information on best practice and the best process and equipment to meet your specifications.

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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Condensation Cleaning

The future for solvent vapour degreasing equipment – Innovation driven by legislation.

Vapour degreasing is the simplest but most effective degreasing and cleaning process for industrial use.  It has, until recently, been subject to little change since it was first invented in the early part of the last century. The name for the process is a misnomer as the cleaning is achieved  by solvent vapour condensing on the cooler target parts the hot liquid solvent dissolving oil and removing dirt.

Vapour degreasing is a mature chemical technology on which legislation is now effecting changes so fundamental that the more accurate name for the process “Condensation Cleaning” should be used to reflect the way in which it works. The open topped tanks so ubiquitous in factories and workshops worldwide are no longer acceptable and the alternatives in equipment design and their  fundamental differences in  technology  which guarantee the continuing use of vapour degreasing in the future need to be considered and understood.

In Europe the United States and in other advanced industrialised economies increasingly stringent legislation to control emissions of VOCs and 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 the coatings was not as good as 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 increased regulation users of solvent 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 condensation cleaning 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  condensation cleaning equivalent where only one tank with small footprint is needed delivering shorter process times and most importantly using minimal energy.

The ideal cleaning process would be “Condensation Cleaning” with 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 of rinsing and especially drying this can only ever be a dream.

A little history of the chemistry helps to explain the changes since the introduction of the vapour degreasing process. Suitable chemicals must be very good solvents for oil, grease, and other industrial soils non-flammable, safe for users and the environment and very stable when heated continuously for long periods.

Halogenated hydrocarbons are the solvents of choice for “Condensation 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 required.  When heated in the sump halogenated solvents produce, a saturated vapour between 3 and 4 times heavier than air at a temperature greater than the ambient conditions. This allows the solvent vapour to condense on the surface of the parts to be cleaned. The condensate dissolves the contaminants such as oil, greases 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 the same temperature as the solvent vapour 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 used more widely in paint strippers 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.

1,1,1 trichloroethane (Genklene from ICI and Chlorothene from Dow Chemicals)  both of which were based on another chlorinated solvent  were to become ubiquitous in the mid part of the last century as a much safer, non- carcinogenic replacement for trichloroethylene. This was an excellent solvent safe for users but which, with increased awareness of the environmental impact of solvents, proved to be depleting the protective ozone layer around the Earth and was subsequently, banned. With the development of the REACH legislation in Europe, which now classifies trichloroethylene as a human carcinogen, usage is allowed but with restrictions and stringent controls for use  authorised in machines which control factory emissions to very low figures close to zero.

Meanwhile cleaning solvents based on 1-bromopropane such as EnSolv were developed in the United States as a drop in replacement for trtichloroethane. EnSolv has an identical profile, stable, non-flammable, with the same physical characteristics such as boiling point and specific gravity and it is an excellent cleaning solvent but without the potential for ozone depletion.

During this time new halogenated solvent blends using trans1.2 dichloroethylene, a highly flammable solvent with similar chemistry to trichloroethylene were also developed for condensation cleaning.  The trans 1.2 dichloroethylene is blended with a variety of different fluorocarbon solvents which are not suitable as cleaning solvents, as they have very low solvency, but are used in these blends as a fire retardants.  An extremely expensive answer to a simple problem, already solved by the development of machines able to safely use the more economical solvents.

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

Solvac Automatic hermetically sealed vapour/liquid cleaning system

Figure 1 – Solvac Automatic hermetically sealed vapour/liquid cleaning system conveyor fed.

The single tank hermetically sealed machines favoured by some equipment manufacturers uses a process tank to contain the solvent and a separate storage tank/vapour generator. Baskets, containing soiled parts, are loaded from the top or through access points on the side of the tank. Lids or doors close over the opening and the process tank is hermetically sealed.  Baskets are immersed in solvent, where agitation, ultrasonics or pumped liquid is circulated through the parts.

When the immersion process is completde solvent is removed to the storage tank and vapour fed to the process tank from a vapour generator for rinsing and drying. On completion of the cycle coil,s located within the process tank  collapse the vapour.  The process tank is evacuated by vacuum and recycled through carbon absorption units to remove traces of solvent from the air until the concentration is below limits set by regulators when the lid opens automatically for the basket of parts, clean and dry, to be safely 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 deal with 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 using well tried techniques not requiring the long recovery times of the hermetically sealed processes. The multilevel system uses a standard vapour degreasing tank design with a sealed loading section above the process tank.

Solvac 1000

Figure 2 Solvac 1000 – Hermetically sealed multilevel vapour degreasing system for manual load batch processing.

Components, to be cleaned, in baskets or on jigs, are fed to the automated hoist in the load section manually, by hoist or conveyor. The loading door is  sealed pneumatically to completely isolate the process. The process tank sealing lid opens and the basket lowered into the process chamber. Depending on the soils  simple condensation cleaning can be used or with the lower section being filled with clean solvent for immersion cleaning with or without ultrasonics or power sprays. Revolving baskets are a further option to improve cleaning in blind or through holes or oil ways in castings and fabrications.

With the process completed the basket rises to the freeboard area where the condensation coils are located and parts allowed to drain and dry.  The tank seal opens to allow the basket into the load section while the lid closes to seal the  process tank. A fan is then activated which produces a negative vacuum in the load area. The loading door partially opens to allow a flow of air through the loading section which is exhausted to atmosphere or can be recycled through carbon absorption systems.

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 completed the door opens fully for removal of cleaned components. 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 hermetically sealed vacuum 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 or loading door opens will be emmited into the workspace 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 lower as no liquid movement or vacuum is involved. The extracted loading section ensures no leakage of solvent into the work area which gives complete safety for operators and factory staff.  The disadvantage of the multilevel machine is the height of the equipment compared to the hermetically sealed machine.  This will often need the equipment be installed in a pit for easy access.

Both designs of process machines 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 both the equipment and solvent suppliers who have the experience to advise on which offers the best process for the application. Equipment and solvent work together as a process and it is essential 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 results and safest installation.

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 or environmental impact. With the new generation of sealed cleaning machines its future as the process of choice for industrial cleaning is assured.

EnSolv cleaning solvents are supplied throughout Europe.

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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Reduce Corrosion Fretting

Why use of SuperCORR A for maintenance of electrical connections on Gas Turbines improves performance by reducing corrosion fretting.

LP Gas Turbines are used throughout the world by extraction industries and manufacturing plants in remote and hostile locations for essential power production. Dusty and wet environments in deserts, mines, grinding mills, pulp and paper mills and on land or sea drilling rigs for gas and oil production. Turbines powering aircraft services while stationary connect and disconnect many times a day in extreme conditions. These applications and locations test connector sealing continuously allowing dust or water to penetrate. This with the flexing of the connecting cables allows sufficient movement between the metal surfaces of the connecting pins to produce fretting corrosion which reduces, interrupts or produces failures in supply.

Regular maintenance of electrical connectors is essential to be certain of uninterrupted supply.

SuperCORR A is an aerosol lubricant containing corrosion preventive compounds, and, as is the case with all lubricants, they can be worn off over time. A manufacturer of connectors tested SuperCORR A to see what the “life” of the lubricant was in a “rub test”. The typical test is 20,000 cycles, i.e. unplug, plug in is one cycle. The test results demonstrated that after 20,000 cycles there were no failures. It was decided to take it one more step and run the same tests for 200,000 cycles. The results again showed no indications of galling or scoring on the connectors at all. The connector looked and tested as good as new. This test
was run under clean conditions in a laboratory but demonstrates the effectiveness of the protective lubricant in SuperCORR A.

As it meets Mil-DLT-87177B specifications it is used by the U.S. Air Force to protect the intricate workings of the F-16 and F-15 fighter jets and by the U.S. Navy on the P 3 Orion electronic surveillance aircraft. Savings for the U.S. government is estimated at $50 million per year. Commercial Aviation aircraft manufacturers recommend it for avionics and electrical switches and connectors and close mechanical application, especially where flights are in salt fog or high humidity.

Containing extremely long-lasting, proprietary anti-corrosive inhibitors SuperCORR A provides a superior lubrication coefficient and protects components against moisture, wear, general and fretting corrosion, surface static electricity, corona, and other electro migration problems. The super thin non-flammable lubricant film is only 7 microns (0.0007 inch) thick and is formulated without sulphates, chlorides or halogens to meet the RoHS directive. It is unexcelled in preventing deterioration and contamination on all surfaces of electronic equipment.

Very fast drying environmentally acceptable solvents are used as carriers and propellants which will not affect most plastics, substrates, metals or other materials used in connector manufacture. The aerosols are supplied with probes which allow access to pins and connector tubes where the low surface tension repels water, dirt dust and metal particles from blind holes and surfaces to produce thoroughly clean holes and surfaces before a second application applies the lubricant film. Reconnection to the supply with cleaned sections of the connector ensures reliable operation even in the most testing of environments. This easy maintenance from one can of SuperCORR A allows this essential task to be carried out in any conditions quickly, easily and securely.

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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Managing “false alarms” and “no fault found” events in Military avionic systems.

Paper presented at the recent 2017 Aviation Electronics Europe Expo in Munich by Dr. Mustafa Ilarslan, PhD.

In a paper presented at the recent 2017 Aviation Electronics Europe Expo in Munich, Germany, Dr. Mustafa Ilarslan, PhD, discussed –  “The management of “False Alarms” and “No Fault Found” events in Military avionic systems”.

In his paper Dr. Ilarslan explains that “False alarms (FAs) impose a devastating impact on military systems.  An entire aircraft can be grounded because of a single avionics for which there are insufficient spares available. If a FA causes a particular Line Replaceable Unit (LRU) to be called out incorrectly, there is a better than even probability that a second copy of the same LRU will also experience FA and much sooner than expected, the fleet will be deprived of all spares for that LRU.  To then find that the LRUs replaced had No Fault Found (NFF) at the repair depot adds “salt to the wound.” while adding huge sums  for lost time in servicing, aircraft downtime  and unnecessarily high stocks of replacement parts.

SuperCORR A was designed specifically to prevent  these problems in avionic as well as electrical and electronic components and systems failures caused by corrosion, including no fault found failures and problems caused by Cadmium corrosion. SuperCORR A is a proprietary Ultra-Thin Film, Water Displacing Lubricant and Corrosion Preventative Compound, manufactured under license in the UK by EnviroTech Europe Ltd.

SuperCORR A is being used on both military and civilian aircraft to prevent fretting corrosion on electronic and electrical connectors, including F-16, P-3 Orion, Boeing 737’s, C-130, F-15,  DHC-6 Twin Otter, Bell helicopters, Bombardier BD-700 series and Bombardier Challenger 300/350, Learjet 45, Legacy 650, and Hawker to name but a few.

SuperCORR A is also being used at BAE Systems, Honeywell and Raytheon Systems to prevent corrosion from causing avionic, electronics, and electrical systems and components failures and for lubrication and protection of moving parts with a thin dry film.

SuperCORR A meets the requirements of  MIL-L-87177A and Mil-DTL-87177B.

More detailed information can be found in the paper “Electrical connector corrosion prevention Improves reliability and reduces costs” by David Horne which is available here:

David_Horne_06T083.pdf

NOTE that while quoting Dr. Ilarslam’s paper, with his permission, he is not endorsing or recommending the use of any specific product, including  SuperCORR A.

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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Vapour Degreasing Solvents For Precision Metal Cleaning

Environmentally friendly precision vapour degreasing and cleaning solvents for the aerospace, precision engineering, medical, optical and electronic industries.

EnSolv vapour degreasing solvents are the most effective alternative to trichloroethylene and other chlorinated and fluorocarbon based solvents. Fast, economical cleaning and degreasing in one tank using minimal floor area.

EnSolv degreasing solvents are specifically formulated to address the difficult precision cleaning problems experienced in high-tech industries where exceptional levels of cleanliness are needed.

EnSolv is a trusted family of environmentally friendly precision vapour degreasing and cleaning solvents for the aerospace, precision engineering, medical, optical and electronic industries. Custom blends serve applications where standard formulations require modifications.

These degreasing solvents are specifically formulated to address the difficult cleaning problems experienced in industries where exceptional levels of precision cleaning are needed.

The EnSolv range of solvents are economical in use, with very high solvency power for excellent fast precision cleaning in any vapour degreasing equipment with greatly improved productivity and lower maintenance costs.  Mid range operating temperature reduces energy usage with a faster cleaning cycle and easier more comfortable handling for operators.

EnSolv is safe for the environment with low global warming and ozone depletion the lower temperature of operation reduces energy usage and reduces CO2 emission. EnSolv® is not classified as a carcinogen enhancing safe usage for operators

EnSolv is approved  by US EPA Snap and is included in US Tri- Service corrosion manuals. Usage is Approved by Boeing and the major OEMs worldwide as a replacement for trichloroethylene.

Manufactured in the UK with excellent customer service, technical support and training from qualified distributors throughout Europe. 

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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