Corrosion behaviour study of heat-resistant steel under oxidation and reduction atmosphere

High-temperature corrosion is one of the main problems that plague the safe operation of thermal power plants. Especially for units burning high-sulfur coal, the probability of high-temperature corrosion is much greater than that of units burning low-sulfur coal. In this paper, the 12Cr1MoV steel used in power plants is selected as the research object, the experiment studied the corrosion behavior of H₂S, SO₂ and air in the temperature range of 400-500°C. We found that 12Cr1MoV has the highest corrosion rate in the H₂S atmosphere, the second in the air, and the slowest in the SO₂ atmosphere. (paper)