Metastable pitting corrosion of 304 stainless steel in 3.5% NaCl solution

被引：215
作者：
Tian, Wenming [1 ]
Du, Nan [2 ]
Li, Songmei [1 ]
Chen, Sibing [2 ]
Wu, Qunying [2 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
[2] Nanchang Hangkong Univ, Inst Sci & Technol, Natl Def Key Discipline Lab Light Alloy Proc, Nanchang 330063, Peoples R China
来源：
CORROSION SCIENCE | 2014年 / 85卷
关键词：
Stainless steel; Polarization; Pitting corrosion; Kinetic parameters; STAINLESS-STEEL; CHLORIDE SOLUTION; SURFACE-ROUGHNESS; MILD-STEEL; NUCLEATION; PITS; GROWTH; BICARBONATE; BEHAVIORS; STABILITY;
D O I：
10.1016/j.corsci.2014.04.033
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Metastable pitting corrosion of 304 stainless steel was studied by potentiostatic polarization and three-dimensional video microscope. The results showed that the dissolution rate of metastable pits increased with time, and peaked before repassivation. The average lifetime of metastable pits decayed with potential. Whereas maximum pit lifetime, average peak value of current transients and pitting nucleation numbers increased with potential. Metastable pits were transformed from cone-shaped to dish-shaped during metastable growth. The ohmic potential drop presented between the pit interior and bulk solution, but the growth controlling factor was metal cations diffusion. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：372 / 379
页数：8
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