Study of corrosion process of 38CrMoAl in flue gas

The experiments were carried out on 38CrMoAl at 3MPa and 150°C, which the temperature and pressure conditions were set to simulate the actual production conditions. The measurement methods included scanning electron microscopy analysis, X-ray energy diffraction spectrum analysis. The experimental results show that the corrosion of 38CrMoAl in the flue gas have a certain periodicity, and the corrosion process can be summarized as a cyclic process: oxidation-film formation-rupture-continuing oxidation. It can be inferred that as the exposure time increases, the corrosion process continues to circulate, and the cracking of the oxide film under the action of various stresses may even cause it to fall off, which would result in serious damage to the material.