The effect of different concentrations of CO2 and H2S in a chloride-acetate solution on the corrosion-mechanical properties of 17Г1С-У steel is studied. In a solution saturated with CO2, the corrosion rate of steel is lower than in the presence of H2S, but increases over time due to the absence of protective carbonate films on the surface, plasticity parameters are 2–2.7 times lower than in air, due to ulcerated surface damage. The corrosion rate and hydrogenation of steel is determined primarily by the hydrogen sulfide concentration in the environment. At a concentration of 100 mg/dm3, dense films of the troilite-mackinavite composition are formed, which inhibit corrosion. At higher concentrations, the corrosion rate increases due to the sulfides transformation and the formation of surface layers with defects. With an increase in the H2S concentration from 100 mg/dm3, the strength characteristics of steel decrease in three, and plasticity by 3–5 times.
Khoma et al. (Fri,) studied this question.