The effects of hydrogen on the breakdown of passive films formed on Type 304 stainless steel

被引：22
作者：
Yang, Q [1 ]
Luo, JL [1 ]
机构：
[1] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G6, Canada
来源：
THIN SOLID FILMS | 2000年 / 371卷 / 1-2期
基金：
加拿大自然科学与工程研究理事会;
关键词：
hydrogen; passive film; stainless steel; corrosion;
D O I：
10.1016/S0040-6090(00)00975-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of hydrogen on the breakdown of passive films formed on Type 304 stainless steel were investigated. Cyclic potentiodynamic polarization measurements revealed that hydrogen decreases the breakdown and protection potentials, indicating an increase in pitting susceptibility. An increase in pitting susceptibility due to hydrogen was confirmed by immersion tests and potentiostatic measurements: hydrogen in passive films increases pit density and decreases the initiation time for the film breakdown. The critical chloride concentration for the film breakdown decreases with the charging current density. Hydrogen also hinders the repassivation process once the film is broken down. Several possible reasons are postulated to explain the effects of hydrogen on the film breakdown. (C) 2000 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：132 / 139
页数：8
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