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Journal of Iron and Steel Research International

, Volume 26, Issue 12, pp 1315–1328 | Cite as

Atmospheric corrosion behavior of low-alloy steels in a tropical marine environment

  • Zhao-liang Li
  • Kui XiaoEmail author
  • Chao-fang Dong
  • Xue-qun Cheng
  • Wei Xue
  • Wei Yu
Original Paper
  • 23 Downloads

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.

Keywords

Marine environment Atmospheric corrosion Carbon steel Weathering steel Rust 

Notes

Acknowledgements

This work was supported by the National Key Research and Development Program of China (Grant No. 2017YFB0304602), the National Basic Research Program of China (973 Program, No. 2014CB643300), and the National Environmental Corrosion Platform (NECP).

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Copyright information

© China Iron and Steel Research Institute Group 2019

Authors and Affiliations

  • Zhao-liang Li
    • 1
    • 2
  • Kui Xiao
    • 1
    • 2
    Email author
  • Chao-fang Dong
    • 1
    • 2
  • Xue-qun Cheng
    • 1
    • 2
  • Wei Xue
    • 1
    • 2
  • Wei Yu
    • 3
  1. 1.Corrosion and Protection CenterUniversity of Science and Technology BeijingBeijingChina
  2. 2.Institute of Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijingChina
  3. 3.Engineering Research InstituteUniversity of Science and Technology BeijingBeijingChina

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