Anodic Polarization Behaviors of Carbon Steel in Bicarbonate Solution

Authors

Jing-mao ZHAO, School of Materials Science and Engineering, Beijing University of Chemical Technology,Beijing 100029, China;
Yu ZUO, School of Materials Science and Engineering, Beijing University of Chemical Technology,Beijing 100029, China;

Corresponding Author

Jing-mao ZHAO

Abstract

The anodic polarization curves of mild steel were measured in sodium bicarbonate solution of various concentrations, and the surface products were analyzed by XPS. Two anodic current peaks and two passive zones are observed in all the curves. When HCO_3~- ions concentration is below 0.1mol/L, the two peaks are so close that the first passive zone is difficult to be observed. When HCO_3~- ions concentration is above 0.1 mol/L, the first peak appears clear, while the second becomes smaller. The XPS results indicate that the out layer of film formed at a higher potential is mainly composed of Fe_2O_(3,) and the inner film is a mixture of ferrous and ferric oxide.

Keywords

Anodic polarization, Carbon steel, Bicarbonate solution

DOI Link

https://doi.org/10.61558/2993-074X.1609

Publication Date

2005-02-28

Online Available Date

2005-02-28

Revised Date

2005-02-28

Received Date

2005-02-28

Recommended Citation

Jing-mao ZHAO, Yu ZUO. Anodic Polarization Behaviors of Carbon Steel in Bicarbonate Solution[J]. Journal of Electrochemistry, 2005 , 11(1): 27-31.
DOI: 10.61558/2993-074X.1609
Available at: https://jelectrochem.xmu.edu.cn/journal/vol11/iss1/6

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