不锈钢中诱发局部腐蚀的贫Cr区研究进展

史伟宁,杨树峰,李京社

Correlation Between Cr-depleted Zone and Local Corrosion in Stainless Steels: A Review

Weining SHI,Shufeng YANG,Jingshe LI

表2 夹杂物、沉淀相和二次相的特征

Table 2 Characteristics of inclusions, precipitates or secondary phases

Type Mass fraction of Cr / % Dimension / μm Morphology Cr-depleted zone Reference Artificial inclusion 36~40 --- Spherical Yes [15] MnS --- 1~2 Spherical Yes [16] MnS --- 1~2 Spherical No [17,18,19] MnS 3~8 1~3 Spherical No [21] MnS 30~40 1~3 Spherical Yes* [25] MnS --- ＜1 Elongated No [26-29] Cr-Mn-O --- --- --- Yes [31] (Ce, Cr, Fe)O 12~20 2~3 Spherical No* [32] (Cr, Mn, Al)O 40~50 ＜1 Spherical Yes [32] X phase 20~30 --- Irregular Yes [33] Cr2N 78~90 ＜1 Rodlike Yes [38-52] (Cr, Fe)2N 55~70 ＜1 Needlelike/ Spherical No [53] M23C6 --- --- --- Yes [61]