Corrosion and tribocorrosion of 17Mn1Si steel in a chloride-acetate solution bubbled with hydrogen sulfide, air, and their mixtures at a ratio of partial pressures \(P_{{\mathrm{H}_{2}}\mathrm{S}}\colon P_{\mathrm{air}}\) 1:1 and 1:10 were investigated. The corrosion rate of steel at low oxygen concentrations is lower than in a saturated hydrogen sulfide solution due to H2S and O2 interaction and a decrease in the concentration of both components. Steel corrosion accelerates at high oxygen concentrations due to the oxidation of sulfide films on the surface and the deterioration of their protective properties. Hydrogen absorption in steel decreases with an increase in oxygen partial pressure. Tribocorrosion of steel in the solution at a ratio of partial pressures 1:1 depends on the combination of anodic dissolution and hydrogen cracking, and at a ratio of 1:10 depends mainly on anodic dissolution. The combined influence of pitting corrosion, iron oxides, and hydroxides in the corrosion products determines the abrasive mechanism of tribocorrosion.
