On the Inhibition Effect of Volatile Nitrogen-Containing Bases on the Hydrogen Sulfide Corrosion of Steel

Highly basic nitrogen-containing compounds are not necessarily effective volatile inhibitors of hydrogen sulfide corrosion of steel, as distinct from the case of atmospheric corrosion. Apparently, this is due to different adsorptivities of organic compounds on oxide and sulfide films. New volatile inhibitors obtained from Schiff bases inhibit hydrogen sulfide corrosion of steel both in the liquid and vapor phases. It was found that addition of water-soluble compounds to Schiff bases can enhance their inhibition effects. The best results in the vapor phase were obtained with the formulations IFKhAN-61M and IFKhAN-61-54.