RUST MODIFIER OF STEEL Russian patent published in 2001 - IPC

FIELD: protection of metals from corrosion by chemical treatment of surface for of steel structures for prolonged period of time, and treatment of rusted steel prior to applying protective paintwork coating. SUBSTANCE: rust modifier of steel comprises, wt %: orthophosphoric acid, 20-30; detergent, 0.5-2.0; sodium hexamethaphosphate, 0.1-0.3; methylpyrazol, 5-10; composition Gamma- 1, 0.01-0.03; sulfaminic acid, 2.0-3.0, and water 54.56-72.39. Claimed composition makes it possible to transform effectively corrosion products, partially dissolve them and form protective film on steel surface, thus allowing one to treat steel surfaces affected by rust layer of up to 300 mcm thick. EFFECT: improved properties of the rust modifier of steel. 2 ex, 2 tbl