AGENT INHIBITING CORROSION OF FERROUS METALS IN ACID MEDIA Russian patent published in 2004 - IPC

FIELD: corrosion protection. SUBSTANCE: inhibitor is meant for use on oil and gas production objects, preferably for protecting wells, combined oil-and- gas and gas condensate systems, and oil-field installations. Inhibitor contains, as accessible raw material, product of condensation of commercially available monoethanolamine and coal-origin phenol and, as solvent, monoatomic isomeric C3- C5-alcohols, in particular fusel oil. Condensation reaction gives tertiary amine showing high activity against general corrosion and hydrogen pickup of metal. EFFECT: enhanced efficiency of general metal protection in high-mineralization low-acidity media at minimal inhibitor concentration, increased aftereffect, and utilized more accessible and inexpensive starting materials. 3 cl, 4 tbl