On the inhibition of hydrogen sulfide corrosion of steel with Schiff bases

The synthesized Schiff bases effectively protect steel in hydrogen sulfide media. Different primary amines were used as the starting reagents to find out how the protection effect of azomethines depends on their nature. It wa s shown that the higher the electron-donating properties tin terms of norma l Wepster constants sigma (H)) of substituents in benzaldehyde the better t he inhibition of steel corrosion. IPKhAN-62, a new water-soluble mixed-type inhibitor of hydrogen sulfide corrosion, was found to be highly effective in corrosion tests and have considerable aftereffect.