Research Progress on Initiation Mechanism of Local Corrosion Induced by Inclusions in Low Alloy Steel

Inclusions are inevitable metallurgical defects in steel that can significantly impact the corrosion resistance of materials by inducing local corrosion initiation. The mechanisms related with the initiation and development of inclusion-induced localized corrosion have been the subject of controversy in recent years. This paper provides a comprehensive review of the various mechanisms of inclusion-in-duced localized corrosion, including electrochemical corrosion, chemical dissolution, and electrochemical-chemical dissolution mechanisms. In addition, controlling the formation and behavior of inclusions is cru-cial for improving the corrosion resistance of steel, while the chemical composition, size and shape of the inclusions are the key influencing factors for inducing localized corrosion. Finally, the future research di-rections for the study of inclusions-induced local corrosion mechanism and the regulation of corrosion-re-sistant steel are discussed.