METAL CORROSION INHIBITOR Russian patent published in 2002 - IPC

FIELD: corrosion protection. SUBSTANCE: steel corrosion inhibitor contains, wt %: hydrocarbon solution of product provided by high-temperature condensation of tall oil fatty acids for petrochemical industry (10-40%) with amine: diethylenetriamine, triethylenetriamine, polyethylenepolyamine, cyanethylated ethylenediamine, triethanolamine, or their mixture (2-10%); polyvinyl alcohol or polyvinylacetate, 0.2-1.0; salts of low- molecular organic acids (formic, acetic, propionic), 1-4; solvent: C1-C4- alcohols or their mixture and nutyl alcohols and 2-ethylhexanol production waste, containing alcohol and ether fractions, 25-85; and industrial-grade toluene, Nefras AP 120/200 or their mixture - the balance. EFFECT: improved protection efficiency and reduced cost. 1 tbl