We investigate the corrosion-electrochemical properties of 17G1SU steel in chloride-acetate solutions for different concentrations of hydrogen sulfide. It is shown that, if this concentration increases, then the corrosion potential of steel shifts to the side of more negative values and the corrosion rate increases almost linearly. The presence of hydrogen sulfide does not affect the values of Tafel constants of the cathodic and anodic reactions. It is shown that the rate of cathodic reactions may become higher as a result of the direct reduction of hydrogen from H2S molecules. For hydrogen-sulfide concentrations > 1500 mg/dm³, the rate of cathodic processes decreases due to the complications of diffusion, which may be caused by the adsorption of hydrogen-sulfide molecules and a decrease in the rate of catalytic recombination of adsorbed hydrogen atoms. Hydrogen-induced cracking of stress-free steel is revealed for hydrogen-sulfide concentrations ≥ 500 mg/dm³.

我们研究了17G1SU钢在氯化物-乙酸盐溶液中对不同浓度的硫化氢的腐蚀电化学性能。结果表明，如果该浓度增加，则钢的腐蚀电位会移向负值更大的一侧，并且腐蚀速率几乎呈线性增加。硫化氢的存在不会影响阴极和阳极反应的Tafel常数值。结果表明，由于H2S分子中氢的直接还原，阴极反应的速率可能会更高。对于硫化氢浓度> 1500 mg / dm ³，由于扩散的复杂性，阴极过程的速率降低了，这可能是由于硫化氢分子的吸附和吸附的氢原子的催化重组速率的降低引起的。硫化氢浓度≥500 mg / dm ^3时，发现了无应力钢的氢诱导开裂。