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| Influence of Sb on Corrosion Behavior of High-strength Structural Steels Exposed to Atmosphere at East Coast Region |
FENG Yuqin1, GUO Tonghan1, YU Weihan1, WU Wei1,2( ), ZHANG Daquan1,2 |
1 Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, School of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 201306, China
2 Shanghai Engineering Research Center of Energy-Saving in Heat Exchange Systems, Shanghai University of Electric Power, Shanghai 200090, China |
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Cite this article:
FENG Yuqin, GUO Tonghan, YU Weihan, WU Wei, ZHANG Daquan. Influence of Sb on Corrosion Behavior of High-strength Structural Steels Exposed to Atmosphere at East Coast Region. Journal of Chinese Society for Corrosion and protection, 2025, 45(5): 1300-1308.
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Abstract High-strength structural steel faces corrosion problems in the marine environment, so it needs to be microalloyed with specific elements to improve its corrosion resistance, but the role of trace alloying elements needs to be further investigated, so in this paper, the differences in the corrosion behavior of Sb-containing and Sb-free high-strength structural steel in the atmospheric environment at the east coast region near Donghai bridge, Lingang new distric, Shanghai are comparatively investigated through field exposure tests, electrochemical tests, and various characterization means to elucidate the effect of the addition of Sb on the corrosion resistance of high-strength structural steel. The research has found that the addition of Sb can optimize the microstructure of the steel with refined grains. At the same time, the addition of Sb can slow down the corrosion rate of steel and reduce the corrosion current density. The corrosion product layers formed on Sb-containing steels have better compactness and protectiveness rather than those on Sb-free steels, which can effectively resist the access of aggressive Cl ions into the matrix. In addition, with the progress of corrosion process, the corrosion pits on the surface of Sb-containing steels become larger in diameter and shallower in depth, and the rate of this change is more obvious than that of Sb-free steels, and this statistical result confirms that the addition of Sb can promote the corrosion pattern toward uniform corrosion.
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Received: 18 October 2024
32134.14.1005.4537.2024.346
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| Fund: National Natural Science Foundation of China(52101068) |
Corresponding Authors:
WU Wei, E-mail: wuweicorr@shiep.edu.cn
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