INHIBITOR OF MICROBIOLOGICAL CORROSION OF CADMIUM-PLATED STEEL Russian patent published in 2007 - IPC C23F11/14 C25D3/26 

FIELD: organic chemistry, anticorrosive agents.

SUBSTANCE: invention relates to protection of machine units against corrosion, constructions and building made of cadmium-plated carbonaceous and low-alloy steels that contact with aqueous solutions of salts, acids, sewages, sea water and moistened soils. Derivative of antipyrine of the general formula: is used wherein R means hydrogen atom (H), -CH₃, -C₂H₅, -C₃H₇, -C₄H₉, -C₅H₁₁, -C₆H₅, -C₆H₁₃ as inhibitors of corrosion of cadmium-plated steel in its presence in aqueous-saline medium containing sulfate-reducing microorganisms. Invention provides enhancing corrosion resistance of steel with cadmium cover and antipyrine derivative incorporated in process of electrolytic precipitation against effect of sulfate-reducing microorganisms in aqueous-saline medium.

EFFECT: valuable technical properties of inhibitor.

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