CORROSION INHIBITOR COMPOSITION Russian patent published in 2000 - IPC

FIELD: corrosion protection. SUBSTANCE: invention aims at preventing corrosion of pipelines and equipment operated in oil and gas production industry in acidic and hydrogen sulfide media. Active constituent of composition contains carboxylic acids-polyethylenepolyamine interaction products (10-30%), other constituents being nonionic surfactant (1-10%), solvent (the balance), and, additionally, kerosene (5-15%). Carboxylic acids can be saturated or unsaturated C₁₀-C₂₀-carboxylic acids. Depending on inhibitor destination, composition may also include up to 20% of linear or branched C₁₀-C₁₈-amines. Such additive imparts stability at high (up to 350 C) and low (up to -65 C) temperatures. EFFECT: extended possible application geography. 2 cl, 1 tbl, 16 ex