Numerical Simulation for Crevice Corrosion of 304 Stainless Steel in Sodium Chloride Solution

被引：0

作者：

Wang Wei ^{[1
,2
,3
]}

Sun Hu-yuan ^{[1
,2
]}

Sun Li-juan ^{[1
,3
]}

Song Zu-wei ^{[1
,2
,3
]}

Zang Bei-ni ^{[1
,2
,3
]}

机构：

[1] Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

[3] Shandong Prov Key Laloratory Corros Sci, Qingdao 266071, Peoples R China

来源：

CHEMICAL RESEARCH IN CHINESE UNIVERSITIES | 2010年 / 26卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Crevice corrosion; Finite element method(FEM); Current density; pH; Multi anodic reaction; MATHEMATICAL-MODEL; PITTING CORROSION; STAINLESS-STEELS; INITIATION; ION; PROPAGATION; LAYER; PITS; IRON;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The authors presented a mechanistic model describing the chemical reactions within a corroded thin, narrow crevice. In the mathematical model, a two-dimensional steady-state was used to predict the crevice pH profile by taking into account dissolved oxygen and hydrogen ions within the crevice. It consists of six parallel electrochemical reactions: multi anodic reactions(Fe, Cr, Ni dissolution reactions) and three cathodic reactions(the oxygen reduction, the hydrogen reaction and water dissociation). Current density distribution and oxygen concentration distribution were determined to be corresponding to the evolution of potential distribution within the crevice. The contribution of each metal reaction to the overall corrosion process was in proportion to the mole fraction, and the simulation provided a good agreement with published experimental results for the crevice corrosion of stainless steel in sodium chloride solution.

引用

页码：822 / 828

页数：7

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