FIELD: corrosion protection. SUBSTANCE: corrosion inhibitor designed to protect oil-field equipment operated in hydrogen sulfide-containing media contains product of interaction of mixture of primary and secondary aliphatic amines (weight ratio from 50:50 to 98:2) with industrial-grade dimethyl phosphite at molar ratio (1.0-1.2):(0.8-1.0), respectively. In a preferred embodiment of invention, bactericidal inhibitor additionally contains hydrocarbon solvent in amount 40 to 80% based on total weight of inhibitor. EFFECT: achieved high inhibitory activity in combination with low cost and accessibility. 2 cl, 2 tbl, 38 ex
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