CORROSION INHIBITOR-BACTERICIDE Russian patent published in 2012 - IPC C23F11/04 C23F11/167 

FIELD: chemistry.

SUBSTANCE: inhibitor contains a product of reacting primary aliphatic amines of general formula RNH₂, where R-N- is an alkyl with 10-16 carbon atoms, with dimethyl phosphite or a mixture of primary and secondary aliphatic amines of general formula RNH₂, where R-N- is an alkyl with 8-30 carbon atoms, in ratio 50-98:2-50, respectively, with industrial dimethyl phosphite, taken in molar ratio 1.0-1.2:0.8-1.0, respectively, wherein the inhibitor additionally contains a product of reacting alkyl-substituted pyridines with alkyl bromides with 10-18 carbon atoms and a nonionic surfactant, with the following ratio of components in wt %: product of reacting primary aliphatic amines with dimethyl phosphite or a mixture of primary and secondary aliphatic amines with industrial dimethyl phosphite 60-70, product of reacting alkyl-substituted pyridines with alkyl bromides 20-25, nonionic surfactant - the balance.

EFFECT: corrosion inhibitor-bactericide is cheap, stable during use and storage, and ensures complete inhibition of sulphate-reducing bacteria.

3 cl, 2 tbl