A new solution to the problems caused by conventional metal cleaning and pretreatment systems in product finishing.
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After many years of being listed as a possible or probable human carcinogen, the widely used solvent trichloroethylene (TCE) has now been listed by the National Toxicology Program (NTP) of the U.S. Department of Health and Human Services as a “known human carcinogen.” Ref; NTP’s 14th Report on Carcinogens (November 3, 2016).
Trichloroethylene is widely used in manufacturing industries as a vapour degreasing solvent but its principal uses are as an intermediate raw material in hydrofluorocarbon chemical manufacture. In the light of a number of human studies showing a causal connection between TCE exposure and an increased risk of kidney cancer, NTP re-evaluated and ultimately reclassified TCE. In addition to cancer risk, other problems that have been attributed to TCE exposure include immunotoxicity, neurotoxicity, reproductive toxicity and developmental toxicity, such as potential fetal cardiac defects.
As a known carcinogen exposure to TCE is highly regulated already in the European Union. From April 2016 its use has required authorisation for specified applications.
The ban on the use of TCE for vapour degreasing, a very widely used cleaning process, causes many problems in the engineering and manufacturing industries where oil and soils need to be removed between stages in the production processes and on finished products. The use of alternative water based cleaners are inconvenient and increase process times and costs.
A safer alternative, EnSolv is available as an established “drop in” replacement for TCE often using existing vapour degreasing equipment. For more information on conversion, help or advice from EnviroTech Europe Specialist team go to www.vapour-degreasing.com.
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Specialist cleaning equipment manufacturer C&C Hydrosonics a division of U.S giant Crest Ultrasonics have solved a problem with seizures occurring the on x-y axis linear tracks on their automatic handling systems fitted to multi tank cleaning systems both aqueous and solvent based.
The automatic handling systems are programmed to process baskets or jigs through a cleaning cycle transferring between tanks, lowering and raising work from the liquids. The motorised carriages use nylon wheels running on case hardened mild steel tracks (stainless steel is not available) which corrode in the chemical atmospheres in the machine canopies.
The corrosion prevents smooth running with wheels seizing and binding on the tracks. The vibration can cause components to be shaken from jigs or in extreme cases the carriage will stall requiring intervention by service engineers to remove corrosion and re-lubricate tracks with oil. This is a temporary measure as the oil is quickly removed by the solvents and water based cleaning solutions with corrosion recurring in a short time.
CORR-EX LCP-177 from EnviroTech Surface Technologies is an innovative dry lubricant formulation with protective properties which forms a self-healing film applied from an aerosol. The inorganic lubricant is unaffected by water and acts a barrier against rusting and corrosion. Extensive Trials by C&C Hydrosonics over a six month period with both solvent and water based systems demonstrated that CORR-EX LCP-177 offered a simple solution to the problem with no seizures during the trial period. Previously maintenance every six weeks was needed, now an aerosol spray of CORR-EX LCP-177 is used only during service visits as a routine lubrication and applied during production of the handling system.
Lee Casey Managing Director of C&C is delighted with the cost savings on reduced service and maintenance calls using CORR-EX LCP-177 but is even more pleased that the inconvenience to customers has been eliminated. Use of CORR-EX LCP-177 has now been extended worldwide on Crest automated handling systems.
CORR-EX LCP-177 is available from EnviroTech Europe Ltd and distributors worldwide.
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Syd Treacher, a Surface Cleaning Consultant discusses the current controversy regarding replacements for trichloroethylene, the most commonly used vapour degreasing solvent, which was to be phased out of use in industrial applications in April 2016.
This article was prompted while reading an article where the author claimed that a grade of fluorocarbon solvent was a “drop in” replacement for TRIKE (trichloroethylene) and n- propyl bromide. This statement is not true for the majority of applications for which trichloroethylene is used – vapour degreasing or more correctly condensation cleaning.
As a consultant in surface cleaning technology I have studied the options available and come to the conclusion that the stabilised n-propyl bromide (nPB) sold in the UK under the brand name EnSolv® is the ONLY realistic “drop in” replacement for trichloroethylene when used for vapour degreasing. It is on average up to 50% cheaper than fluorocarbon formulations being proposed as alternatives.
From my evaluation it is clear current users of EnSolv® can continue to use the solvent and equipment or if still if using TRIKE you can make the change to EnSolv® in a day. A decision has to be made quickly as the “sunset date” after which TRIKE will not be available for industrial use without authorisation in the EU was April 2016 but you can substitute with only minor changes to control settings on equipment. The legislation regarding the use of nPB may change in the future but if this happens you will have at least 3 years to decide on the alternative so the savings in solvent costs over this period will be considerable compared to alternative materials. Read the full article here..
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The remarkable effects of using SuperCORR A a corrosion inhibitive lubricant spray which meets the requirements of Mil-L-87177A are reported in detail in this paper by Scott Dotson in a USAF study for aircraft reliability and maintenance. SuperrCORR A is safe with all metals and plastics and other materials of construction. The dry film is self healing and can be used for electrical and mechanical maintenance to improve reliability and reduce failures in use due to corrosion.
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ProSolv is a new, less expensive fluorinated solvent formulation for all precision cleaning applications.
ProSolv the new critical cleaning solvent has been developed by EnviroTech Surface Technologies as a “drop in” cost effective alternative which is less expensive than the current fluorocarbon formulations you may be using.
ProSolv offers future proof cleaning systems giving long term savings without compromising quality. Substitution is simple with no changes to equipment or control settings needed.
Users of trichloroethylene, which is due to be phased out as a cleaning solvent in April 2016, only 3 months away, may be able to use ProSolv as a cost effective replacement in many applications.
ProSolv is friendly to the environment it has zero Ozone Depletion Potential (ODP) and a very low impact on global warming. In addition, it is a non-flammable stable azeotrope needing no testing for acid acceptance or stabilising additives, easy to use and maintain and safer for employees and the workplace.
ProSolv like many other fluorinated solvent azeotropes is extremely effective for precision cleaning in hightech industries such as aerospace, aviation, electronics and medical due to the use of an additive trans 1,2-dichloroethylene.
This produces a powerful fluorinated cleaning solvent with a very low surfaces tension which cleans blind holes and the smallest gaps more effectively at a lower cost. With these wide range of properties ProSolv is particularly effective used with ultrasonics.
ProSolv can usually be used in existing degreasers or sprayed from an aerosol container. Our fluorinated solvents are ideal for the cost-conscious user for precision cleaning and degreasing of electronics, metals and glass.
ProSolv can be used to remove adhesives, fluxes, pastes, buffing compounds, greases, silicone oils, particulates, resins, waxes and other oils and soils.
ProSolv is only one of a wide range of cleaning solvents and solutions produced by engineering cleaning specialists EnviroTech Surface Technologies. Our Technical Centre in Essex is available for you to visit to test clean your components with ProSolv or compare results with the other products such as EnSolv or Clarea solvents we supply. Our technical team have extensive knowledge of equipment and systems to help you find the most effective, budget-friendly, future proof and environmentally conscious solution for your business. EnviroTech Surface Technologies have distributors located across the E.U. and Middle Eastern countries all of whom can offer technical advice and support.
Trichloroethylene will not be obtainable for metal cleaning or other uses without authorisation after April 2016.
ProSolv® enables high performance cleaning at a lower cost than other fluorinated solvent cleaners. A proprietary tertiary azeotropic formulation based on a fluorinated solvent which provides a direct replacement for trichloroethylene and other chlorinated solvents.
ProSolv® is extremely stable and simple to use meeting all the increasingly stringent legislative demands for safer, non flammable solvents with a low environmental impact in the precision engineering industries.
ProSolv® can be used in most existing vapour degreasing equipment and can be used safely for immersion cleaning using ultrasonics, where it has been optimised with a high specific gravity and very low surface tension.
Unlike other chlorinated solvents ProSolv® can be used for manual cleaning in a suitably ventilated area. Typical applications are where high performance critical cleaning is required at lower cost than other fluorinated solvent cleaners. Vapour degreasing for medical, aerospace, optics, oxygen equipment service, high vacuum components and electronics.
ProSolv® is an excellent choice to replace flammable solvents such as MEK, Acetone, Iso propyl alcohol (IPA) or hydrocarbons where manual wiping or brush cleaning is the preferred cleaning method.
ProSolv® is a stable azeotrope which can be recycled by distillation for reuse through many cycles. It is a very stable mixture with no need for monitoring or the need for additives or stabilisers.
ProSolv® offers a cost effective replacement in formulations for dip, spray or aerosol applications and as a fast drying carrier solvent for oil, silicones and other lubricants.