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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.
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 ...
A solvent style parts washer is filled with several gallons of solvent that is stored in a settling pan at the bottom of the washer. A small flame-tight electric liquid pump is immersed in the solvent and skims clean solvent from near the top of the settling tank, and pumps it at low pressure through a stiff flexible nozzle onto a metal grating ...
The primary solvent may be water or a hydrocarbon (historically, toxic solvents such as carbon tetrachloride and 1,1,1-Trichloroethane were used industrially, but have been phased out [9]). There are several formulations, dependent on the item being cleaned and the type of contamination (e.g., degreasing of metal, cleaning of printed circuit ...
Degreasing may also refer to the removal of excess fat and grease lodged within the fur pelts of bears, raccoons, beavers, possums and wolverines. In modern-day tanning operations, the removal of this grease is achieved by adding a liquid chemical agent, usually 2 fluid ounces (60 milliliters ) to every 5 gallons (19 litres ) of pickling solution.
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. However, "Exposure to ...
A solvent (mineral spirits) may be added. Nonferrous metal cleaners contain ammonia , ammonium soaps ( ammonium oleate , stearate ) and chelating agents ( ammonium citrate , oxalate ). For special type of precious metals especially those used for luxury watches and high-end jewelry, special type of cleaning agents are usually used to clean and ...
For frequent and industrial use, cleaning and degreasing may be replaced by supercritical carbon dioxide or dry Ice blasting, which is abrasive. This requires a setup to apply the carbon dioxide. While the harmful vapors are eliminated, the CO 2 must be ventilated. Applying the carbon dioxide causes electrostatic discharge by the expanding gas.