Corrosion resistance of the anti-sulfide steel in the CO_2/H_2S containing solutions

摘要

The present work primarily investigates the corrosion characterization of the common P110 steel and the anti-sulfide P110SS steel in CO_2-containing solution with or without hydrosulfuric acid (H_2S) at 70℃. The electrochemical techniques such as potentiodynamic polarization sweep and electrochemical impedance spectroscopy (EIS) were used to disclose the differences of the corrosion mechanisms between both P110 and P110SS steels in CO_2-containing solution with various additions of H_2S. The EIS data fitted by ZsimpWin software were analyzed and discussed. The experimental results indicated that H_2S could accelerate and also inhibit the corrosion attack according to the changes of corrosive environments.