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| Atmospheric corrosion behavior of low-alloy steels in a tropical marine environment |
| Zhao-liang Li1,2, Kui Xiao1,2, Chao-fang Dong1,2, Xue-qun Cheng1,2, Wei Xue1,2, Wei Yu3 |
1 Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China
2 Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
3 Engineering Research Institute, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract The corrosion behavior of carbon steels and weathering steels was investigated in a tropical marine environment. And both exhibited similar corrosion weight-loss behavior in tropical marine environments. Corrosion weight loss (W) as a function of exposure time (t) can be calculated using the power function, W = Atn. The values of the initial corrosion rate, A, and corrosion tendency, n, can be easily obtained by taking the logarithm of the power equation. However, the corrosion rust-layer structure of the two materials was quite different. The rust layer of carbon steel presents a single-layer structure. Meanwhile, the rust layer of weathering steel exhibits a single-layer structure after exposure for about 24 months and then gradually evolves into a double-layer structure. The main corrosion products of the steels are β-FeOOH, γ-FeOOH, and Fe3O4 in the initial stage of exposure. In the rust layers, α-FeOOH appeared after 12 months of exposure.
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Received: 13 October 2018
Published: 25 December 2019
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| Cite this article: |
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Zhao-liang Li,Kui Xiao,Chao-fang Dong, et al. Atmospheric corrosion behavior of low-alloy steels in a tropical marine environment[J]. Journal of Iron and Steel Research International, 2019, 26(12): 1315-1328.
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2019, Vol. 26 
