Influencing Factors of Corrosion Rate of Cr13 Steel in CO₂ Saturated Solution

Effects of Cl- concentration, H2S concentration and temperature in the CO2 saturated solution on the corrosion rate of Cr13 steel were studied by potentiodynamic polarization and weight loss method. The results showed that, the corrosion rate and corrosion current density of Cr13 steel at 50 ℃ increased with increasing the H2S content in solution with 50 g/L Cl-. And, at 50 ℃ and in H2S concentration of 0.06 mol/L, when Cl- concentration was below 50 g/L, the corrosion rate increased with increasing the concentration of Cl-. When the concentration of Cl- was above 50 g/L, the corrosion rate decreased with increasing the Cl- concentration. When of the concentration H2S and Cl- was 0.06 mol/L and 50 g/L respectively, the corrosion rate increased with increasing temperature.