METAL CORROSION INHIBITOR Russian patent published in 1999 - IPC

FIELD: corrosion protection. SUBSTANCE: invention, in particular, relates to steel corrosion inhibitors for application in oil and gas and other industries. Inhibitor constitutes hydrocarbon solution of products of high-temperature condensation of light tallow oil fatty acids (10-40%), an amine selected from the group including: diethylentriamine, polyethylenepolyamine, cyanethylated ethylenediamine, triethanolamine, or their mixture (2-10%), and industrial-grade toluene or its mixture with a special product (the balance). Inhibitor may also contain special-type additives in amounts 6- 10%. EFFECT: reduced freezing point (-50 C) and increased aftereffect time. 2 cl, 2 tbl, 31 ex