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Effect of Deep Sea Pressures on the Corrosion Behavior of X65 Steel in the Artificial Seawater

  • Qiu-Shi Li
  • Shun-Zhong Luo
  • Xu-Teng Xing
  • Jing Yuan
  • Xin Liu
  • Ji-Hui Wang
  • Wen-Bin Hu
Article
  • 2 Downloads

Abstract

The corrosion behaviors of X65 steel in the artificial seawater at different hydrostatic pressures are investigated by potentiodynamic polarization measurements, electrochemical impedance spectroscopy measurements and weight loss measurements. The corroded morphologies and the corrosion products are also investigated by scanning electron microscopy, X-ray diffraction analysis and Raman analysis. The results show that the corrosion current increases as the hydrostatic pressure increases. The charge transfer resistance decreases as the hydrostatic pressure increases. The corrosion products are mainly composed of γ-FeOOH and Fe3O4 at the atmospheric pressure, while the main components are γ-FeOOH, Fe3O4, and γ-Fe2O3 at the high pressure. The hydrostatic pressure accelerates the corrosion of X65 steel due to its effect on the chemical and physical properties of corrosion products, including the promoted reduction of γ-FeOOH and the wider and deeper cracks on the corrosion products layer.

Keywords

X65 steel Deep sea pressures Electrochemical measurements Corrosion 

Notes

Acknowledgements

This work was supported by National Basic Research Program of China (2014CB046801), National Natural Science Foundation of China (51471117), and Key Project of Tianjin Natural Science Foundation (13JCZDJC29500).

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Copyright information

© The Chinese Society for Metals (CSM) and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Qiu-Shi Li
    • 1
  • Shun-Zhong Luo
    • 1
  • Xu-Teng Xing
    • 1
  • Jing Yuan
    • 1
    • 2
  • Xin Liu
    • 1
  • Ji-Hui Wang
    • 1
  • Wen-Bin Hu
    • 1
  1. 1.Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and EngineeringTianjin UniversityTianjinChina
  2. 2.College of Physics Electronic Information EngineeringQinghai University for NationalitiesXiningChina

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