Pitting corrosion behavior of AISI 1020 carbon steel exposed to natural aeration and solutions containing Cl− or/and 
was investigated using electrochemical and surface characterizations. The results reveal a synergistic effect of 
and Cl− on pitting corrosion behavior of carbon steel. 
serves as the main source of hydrogen and acts as a reactant to promote the formation of FeCO3/Fe2O3/Fe3O4 films as corrosion product, which are a prerequisite for pitting initiation and propagation. Cl− contributes to the catalytic dissolution of the Fe matrix, film breakdown, and diffusion within the occluded cavity, thereby significantly enhancing the pitting corrosion of carbon steel.
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1 September 2019
SCIENCE SECTION|
May 11 2019
Synergistic Contribution of Chloride and Bicarbonate Ions to Pitting Corrosion Behavior of Carbon Steel
Shaohua Zhang;
Shaohua Zhang
*College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi,
China.
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Lifeng Hou;
Lifeng Hou
*College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi,
China.
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Huayun Du;
Huayun Du
*College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi,
China.
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Huan Wei;
Huan Wei
*College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi,
China.
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Baosheng Liu;
Baosheng Liu
**College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, Shanxi,
China.
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Yinghui Wei
Yinghui Wei
‡
*College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi,
China.
**College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, Shanxi,
China.
‡Corresponding author. E-mail: [email protected].
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CORROSION (2019) 75 (9): 1034–1043.
Article history
Received:
February 26 2019
Revision Received:
May 11 2019
Accepted:
May 11 2019
Citation
Shaohua Zhang, Lifeng Hou, Huayun Du, Huan Wei, Baosheng Liu, Yinghui Wei; Synergistic Contribution of Chloride and Bicarbonate Ions to Pitting Corrosion Behavior of Carbon Steel. CORROSION 1 September 2019; 75 (9): 1034–1043. doi: https://doi.org/10.5006/3195
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