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Licensed Unlicensed Requires Authentication Published by De Gruyter May 8, 2020

Fabrication and performance evaluation of nickel-rich conductive coating for carbon steel grounding grids in saline-alkali soil solution

  • Xinxin Liu , Yitong Tan , Xinhua Zhang , Qiangqiang Liao EMAIL logo and Zhiqin Wang
From the journal Corrosion Reviews

Abstract

A nickel-rich conductive anti-corrosive coating (CACC) was fabricated to improve the corrosion resistance of the carbon steel grounding materials. The coating was tested using surface contact resistance measurement, electrochemical impedance spectroscopy (EIS) and surface characterization. The results indicate that the increase of the nickel powder content in the coating induces its electrical conductivity enhancement; the surface contact resistance is as low as 0.05 Ω/cm2 when the nickel powder content is 20%. The EIS data show that the anti-corrosive performance of the coating with 20% nickel powder content in three soil saline-alkali solutions (mild, moderate and severe) is higher than that with 40% nickel powder content, and the impedance of the coating decreases with the increase of the salt concentration. It is detected that 20% nickel powder content can achieve a good balance between low surface contact resistance and high corrosion resistance of the coating.


Corresponding author: Qiangqiang Liao, Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai Engineering Research Center of Energy-Saving in Heat Exchange Systems, Shanghai University of Electric Power, Shanghai, 200090, PR China, E-mail:

Funding source: Science and Technology Commission of Shanghai Municipality

Award Identifier / Grant number: 17DZ2282800

Award Identifier / Grant number: 19DZ2271100

Acknowledgments

The work was supported by Science and Technology Commission of Shanghai Municipality (17DZ2282800 and 19DZ2271100), China.

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Received: 2019-12-25
Accepted: 2020-04-09
Published Online: 2020-05-08

© 2020 Walter de Gruyter GmbH, Berlin/Boston

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