Abstract
A self_made wedge_shaped simulated crevice apparatus was designed to investigate the solution chemistry in crevice of carbon steel and its anodic polarization behavior. For carbon steel with 3.5%(wt) NaCl , the change and the distribution of electrode potential , concentration of Cl- and pH value of solution in the crevice, and the current density of metal in the crevice were measured respectively under various conditions of anodic polarization. The results showed that without polarization the metal about 2 cm away from the opening of the crevice was attacked preferentially because of its lowest free corrosion potential. The anodic polarization promoted the corrosion in the crevice, and increased H+ and Cl- concentrated in the crevice. The metal at the mouth of crevice was corroded more seriously because of the polarization, but the metal at the deep of crevice was protected by the film of salt.
Keywords
Carbon steel, Crevice corrosion, Solution chemistry, Anodic polarization
Publication Date
1999-05-28
Online Available Date
1999-05-28
Revised Date
1999-05-28
Received Date
1999-05-28
Recommended Citation
Zhuo Chen, Cuiwei Du, Bei Cao, Yinshun Wu, Hai Yang, Zhengrong Zhang.
Investigation of Solution Chemistry in Crevice of Carbon Steel and Its Anodic Polarization Behavior[J]. Journal of Electrochemistry,
1999
,
5(2): Article 4.
DOI: 10.61558/2993-074X.3167
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol5/iss2/4
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