恒电流充电法和小幅三角波法在腐蚀监测中的可靠性研究  

Reliability of Constant Current Charging Method and Slightly Triangular Wave Method for Corrosion Monitoring

作　　者：刘福国[1] 官自超 苏锋[1] 陈斌[1] 邱景[2] 杜敏[2] 

机构地区：[1]海洋石油工程股份有限公司设计公司,天津300451 [2]中国海洋大学化学化工学院海洋化学工程与技术教育部重点实验室,青岛266100

出　　处：《腐蚀科学与防护技术》2014年第1期13-18,共6页Corrosion Science and Protection Technology

基　　金：国家科技重大专项(2011ZX05027-004)资助

摘　　要：分别采用恒电流充电法和小幅三角波法监测Q235钢在海水中的腐蚀情况。结果表明,恒电流充电法和小幅三角波法能够较好地监测其在海水中的腐蚀情况;恒电流充电法推荐采用阴极极化,外加恒电流-3或-5μA/cm2,极化时间1 min;小幅三角波法推荐采用阴极极化,扫描速率0.1或0.2 mV/s。In order to develop a simple, fast, and reliable technology for corrosion monitoring for metallic materials in marine environment, the reliability of two electrochemical methods, constant current charging method and slightly triangular wave methodwere comparatively examined for the corrosion process of Q235 carbon steel in seawater. The results indicate that the two methods can monitor the corrosion of carbon steel in seawater well; cathodic polarization is recommended for constant current charging method, and the plused constant current density is-3 or- 5 μA/cm2; cathodic polarization is recommended for slightly triangular wave method, and the scan rate is 0.1 or 0.2 mV/s.

关 键 词：腐蚀监测 恒电流充电法 小幅三角波法 

分 类 号：TG174[金属学及工艺—金属表面处理]