In situ SECM mapping of pitting corrosion in stainless steel using submicron Pt ultramicroelectrode and quantitative spatial resolution analysis

被引：29

作者：

Ye, Zhenni ^{[1
]}

Zhu, Zejie ^{[1
]}

Zhang, Qinhao ^{[1
]}

Liu, Xiaoyan ^{[1
]}

Zhang, Jianqing ^{[1
]}

Cao, Fahe ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China

来源：

CORROSION SCIENCE | 2018年 / 143卷

基金：

中国国家自然科学基金;

关键词：

Stainless steel; Modelling studies; Electrochemical calculation; SEM; Pitting corrosion; SCANNING ELECTROCHEMICAL MICROSCOPY; CHLORIDE SOLUTION; LOCALIZED CORROSION; CONCENTRATION PROFILES; ACIDIC-SOLUTION; PASSIVE FILMS; ELECTRODE; SURFACES; BEHAVIOR; 304-STAINLESS-STEEL;

D O I：

10.1016/j.corsci.2018.08.014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The spatial resolution of SECM is strongly related to the tip size and tip-substrate distance. In the current research, a submicron Pt ultramicroelectrode with 0.7 mu m radius was successfully applied as an SECM probe for in situ imaging of the evolution of pitting corrosion in 316 L stainless steel at a 1 mu m distance in a neutral NaCl solution. Three-dimensional COMSOL Multiphysics models were built to quantify the spatial dimension of pitting corrosion. The results indicate that the spatial resolution of dynamic active pits in 316 L is within the submicron scale. We also report its dynamic evolution process.

引用

页码：221 / 228

页数：8

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