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Journal of Materials Engineering and Performance

, Volume 26, Issue 4, pp 1751–1757 | Cite as

Corrosion Behavior of Copper-Clad Steel Bars with Unclad Two-End Faces for Grounding Grids in the Red Clay Soil

  • Yupei Shao
  • Miaomiao Mu
  • Bing Zhang
  • Kaibin Nie
  • Qiangqiang Liao
Article

Abstract

Iron-aluminum oxides in the red soil have a significant impact on the corrosion behavior of the metal for grounding grids. Effects of iron-aluminum oxides on the corrosion behavior of the cross section of copper-clad steel in the red soil have been investigated using electrochemical impedance spectroscopy and Tafel polarization. All the data indicate that the iron-aluminum oxides can promote the corrosion of copper-clad steel in the red soil. The corrosivity of the red soil greatly increases after iron-aluminum oxides are added into the soil. Iron-aluminum oxides promote galvanic corrosion of copper-clad steel and increase the corrosion degree of the center steel layer. The iron-aluminum oxides stimulate corrosion process of copper-clad steel acting as a cathodic depolarizing agent. XRD results further validate that the corrosion products of the copper-clad steel bar mainly consist of Fe3O4 and Cu2O.

Keywords

EIS grounding grids iron-aluminum oxides soil corrosion 

Notes

Acknowledgments

The work was supported by Innovation Program of Shanghai Municipal Science and Technology Commission (14DZ2261000), China.

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Copyright information

© ASM International 2017

Authors and Affiliations

  • Yupei Shao
    • 1
  • Miaomiao Mu
    • 1
  • Bing Zhang
    • 2
  • Kaibin Nie
    • 1
  • Qiangqiang Liao
    • 1
  1. 1.Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai Engineering Research Center of Energy-Saving in Heat Exchange SystemsShanghai University of Electric PowerShanghaiChina
  2. 2.Lab of Grounding Engineering and Technology for State GridShanxi Electric Power Research InstituteXi’anChina

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