NPFC - MIL-C-10578
CORROSION REMOVING AND METAL CONDITIONING COMPOUND (PHOSPHORIC ACID BASE)
|Publication Date:||28 February 1982|
This specification covers five types of concentrated phosphoric acid corrosion removing and metal conditioning compound which, when diluted with water and applied to metal surfaces, will remove rust from ferrous metal surfaces and provide a slight etching action for ferrous and nonferrous metals to promote the adhesion of paint or corrosion preventives (see 6.1).
Types I and II materials are suitable for use as rust removers for ferrous metal parts and as metal conditioners for ferrous and nonferrous metals prior to application of paints and/or corrosion... View More
Types I and II materials are suitable for use as rust removers for ferrous metal parts and as metal conditioners for ferrous and nonferrous metals prior to application of paints and/or corrosion preventives. Very heavy rust incrustations should be mechanically removed and heavy grease should be removed by adequate grease solvents or grease removal methods. Type I material will remove more rust and grease than type II. Type I material should always be rinsed off with water after application. Type II material does not have to be rinsed off with water but may be wiped off with clean rags prior to painting.
Type III conditioner is intended for use on chromium plated ferrous surfaces and on those ferrous surfaces which require very close tolerances. The articles should first have very heavy rust incrustations mechanically removed and have grease removed by vapor degreasing. The article is left in the conditioner until the rust is dissolved or loosened sufficiently to permit easy removal. It is then removed, rinsed and dried. It is then ready for further corrosion preventive treatments or for use.
Type IV is similar to type I, except that nonfoaming detergents are used. It is intended for use in pressurized spray systems at temperatures up to 150°F (66°C) after which it is washed off with water.
Type V material is similar to type I, except that grease removing solvents are not used and the material is suitable for use on surfaces from which grease and oil have been previously removed by solvent or alkali cleaning. It may be used in immersion tanks at ambient temperatures or at temperatures not exceed 140°F (60°C).View Less