Corrosion Behavior of XCS-lode Steel and 30CrNi3Mo Steel in Simulated Industrial Atmospheric Environment

The corrosion behavior of XCS-lode steel and 30CrNi3Mo steel in simulated industrial atmosphere was analyzed by scanning electron microscope, X-ray diffractometer and electrochemical test. The results showed that in simulated industrial atmospheric environment, the corrosion rates of XCS-lode steel and 30CrNi3Mo steel showed a decreasing trend with the prolongation of corrosion time, and the overall corrosion rate of XCS-lode steel was smaller than that of 30CrNi3Mo steel. The corrosion product film on surface of 30CrNi3Mo steel could not be formed in a short time, but the corrosion product film on the surface of XCS-lode steel could be formed in a very short time. The main component of corrosion products on the surface of XCS-lode steel was electrochemically stable α-FeOOH, the main component of corrosion products on the surface of 30CrNi3Mo steel was Fe₃O₄, the corrosion product film impedance of XCS-lode steel was significantly higher than that of 30CrNi3Mo steel, explaining that the protective performance of corrosion product film on the surface of XCS-lode steel to the steel matrix was better than that of 30CrNi3Mo steel.