The effect of chemical additives on the kinetics of the absorption of hydrogen in steel

Abstract

In order to prevent the hydrogen degradation and corrosion damage of steels in wet sulfide environments, electrochemical hydrogen permeation experiments and immersion tests were performed on steel to evaluate the beneficial effect of chemical additives. The permeation results show that addition of Fe 3+, Fe 2+, Cu 2+, Zn 2+, and Ni 2+ ions to sulfide environments are beneficial in improving the hydrogen embrittlement resistance of steel. Hydrogen permeation data are slightly affected by addition of Mn 2+, Mg 2+, Ca 2+, Cl −, SO 4 2− and S 2O 3 2− ions. V 2O 5 exhibits a hydrogen poison effect for steel. CrO 4 2−, MoO 4 2− and thiourea are corrosion inhibitors, also show cathodic poison effect.