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n-propyl bromide (nPB) based solvents for vapor degreasing, in comparison to other solvents for vapor degreasing, are environmentally friendly. nPB solvents are non flammable (no flashpoint), non chlorinated, U.S. EPA SNAP approved, non hazardous waste (per U.S. Department of Transportation), and non ozone layer depleting.
Solvent degreasing is a process used to prepare a part for further operations such as electroplating or painting. Typically it uses petroleum , chlorine , dry ice or alcohol based solvents to dissolve the machining fluids and other contaminants that might be on the part.
Trichloroethylene (TCE) is a halocarbon with the formula C 2 HCl 3, commonly used as an industrial metal degreasing solvent. It is a clear, colourless, non-flammable, volatile liquid with a chloroform-like pleasant mild smell [3] and sweet taste. [9] Its IUPAC name is trichloroethene. Trichloroethylene has been sold under a variety of trade names.
Usually, the cleaning takes place in a workshop. Several common methods include solvent degreasing, vapor degreasing, and the use of an aqueous parts washer. Companies often want the charging, loading and unloading to be integrated into the production line, which is much more demanding as regards size and throughout the ability of the cleaning ...
Then, chlorinated solvents in vapor degreasers became an industry standard. During the 1980s environmental and safety issues led to the banning of chlorinated solvents for parts cleaning. [2] Aqueous-based cleaning systems took on new prominence that led to many improvements, in the systems and the processes.
Use as a cleaning solvent for parts often involves involves flushing, vapour degreasing, and hand wiping the components. Some components may be cleaned with water based cleaners, but these are then flushed and verified clean with HCFC-225. NASA has made efforts to recapture, distill, and re-use HCFC-225 where it is feasible.