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

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.