Electrochemical Behavior and Nonlinear Mott-Schottky Characterization of a Stainless Steel Passive Film

被引：40

作者：

Gao, Shujun ^{[1
]}

Dong, Chaofang ^{[1
]}

Luo, Hong ^{[1
]}

Xiao, Kui ^{[1
]}

Li, Xiaogang ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Ctr Corros & Protect, Inst Adv Mat & Technol, Beijing 100083, Peoples R China

来源：

ANALYTICAL LETTERS | 2014年 / 47卷 / 07期

基金：

中国国家自然科学基金;

关键词：

PDM; Electrochemical behavior; Nonlinear Mott-Schottky; 304-stainless steel; SEMICONDUCTING PROPERTIES; ELECTRONIC-STRUCTURE; PITTING CORROSION; 304-STAINLESS-STEEL; PH;

D O I：

10.1080/00032719.2013.865201

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The electrochemical behavior of 304-stainless steel in solutions with different pH values and chloride concentrations was investigated by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and a nonlinear Mott-Schottky analysis method. The results showed that the corrosion behavior of 304-stainless steel was affected by various factors, such as pH, chloride ion concentration, and dissolved oxygen. The pit initiation and propagation stage were observed in EIS plots through the addition of sodium chloride. In addition, the effect of pH on the passive film dominated one of the film growth kinetic reactions. The effect of chloride ion concentration was caused by the generation of more cation vacancies, leading the passive film more susceptible to pitting, which was also demonstrated by X-ray Photoelectron Spectroscopy. The results are consistent with the point defect model.

引用

页码：1162 / 1181

页数：20

共 43 条

[1] Galvanic coupling between carbon steel and austenitic stainless steel in alkaline media [J].