Mechanisms of inclusion-induced pitting of stainless steels:A review  

作　　者：Yangting Sun Xin Tan Rulei Lan Guoyong Ran Jin Li Yiming Jiang 

机构地区：[1]Department of Materials Science,State Key Laboratory of Molecular Engineering of Polymers,Fudan University,Shanghai 200438,China

出　　处：《Journal of Materials Science & Technology》2024年第1期143-156,共14页材料科学技术（英文版）

基　　金：supported by The National Natural Science Foundation of China(Nos.52271053 and 52271096)'the Shanghai Rising-Star Program(No.23QA1400500);the Young Elite Scientists Sponsorship Program by CAST(No.2022QNRC001).

摘　　要：Pitting is a common type of localized corrosion in passive alloys that can cause rapid failure of material or equipment.In the case of stainless steels,non-metallic inclusions have been identified as the most susceptible sites for pitting,and have therefore garnered significant attention.This review critically ex-amines the issue of how inclusions induce pitting,with a particular focus on three mechanisms:sponta-neous dissolution of inclusions,active dissolution of Cr-depleted regions,and propagation of microcracks at the inclusion-matrix interface.While researchers have made significant strides in understanding these mechanisms over the past few decades,many gaps and controversies remain.Details such as the ini-tial driving force of inclusion dissolution and factors affecting Cr-depleted regions require further study.Moreover,some old concepts and methods need to be revised to arrive at more credible conclusions.This review aims to delve deeply into these important issues and provide inspiration for future research.

关 键 词：PITTING INCLUSION Stainless steel Localized corrosion MNS 

分 类 号：TG1[金属学及工艺—金属学]