First-principles explain the anodic dissolution corrosion of stainless steel surface

When the second phase is precipitated from the iron surface, the iron surface and the second phase precipitate constitute the galvanic cell. The occurrence of REDOX reaction is accompanied by the process of surface electrochemical corrosion, resulting in the continuous dissolution of the anode material. Above all, the existence of Al/Si atoms can reduce the open circuit voltage between anode and cathode materials to improve the corrosion resistance of the steel.