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Corrosion Behavior of WC–10 wt % Ni3Al Composite in Acidic Media

  • Production, Structure, Properties
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Abstract

The room temperature corrosion behavior of WC–10 wt % Ni3Al composite and WC–8 wt % Co hardmetal in various acidic solutions (1 M H2SO4, 1 M HCl and 1 M HNO3) were compared and investigated utilizing immersion test, electrochemical measurement and surface analytical techniques. The results show that in H2SO4 solution WC–10Ni3Al composite has a nobler free corrosion potential, lower corrosion current density (Icorr) values and intrinsically better corrosion resistance than WC–8Co. Notably, pseudopassivity was observed in the polarization curves of WC–10Ni3Al in both HCl and H2SO4 solutions. In addition, although WC–10Ni3Al is corroded much faster in HNO3 solution than in the other two mediums, it exhibits a superior corrosion resistance compared to WC–8Co. The corrosion mechanism of WC–10Ni3Al composites is dominated by Ni dissolution.

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Author information

Authors and Affiliations

  1. Guangdong Key Laboratory for Advanced Metallic Materials Fabrication and Forming, South China University of Technology, Guangzhou, 510640, China

    Xiaoqiang Li, Minai Zhang, Xiaojian Xia, Ting Cao & Liang Liang

  2. Chemical Engineering and Materials Science, University of California, Irvine, 92617, USA

    Minai Zhang

  3. Dongguan hyperpowder Co. Ltd., Dongguan, 523808, China

    Huiyun Li

Authors
  1. Xiaoqiang Li
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  2. Minai Zhang
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  3. Xiaojian Xia
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  4. Ting Cao
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  5. Liang Liang
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  6. Huiyun Li
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Corresponding author

Correspondence to Minai Zhang.

Additional information

The text was submitted by the authors in English.

Funding

This topic of research was financed by the National Natural Science Foundation of China (Nos. 51474108, 51575193), the Science and Technology Project of Guangdong Province (No. 2017A010103005), the Guangzhou Science and Technology Project (Nos. 201604020139, 201605131028065), the Fundamental Research Funds for Central Universities (No. 2015ZP029), and Dongguan Introduction Plan of Research Team (No. 201536000200027). This work is also supported by China Scholarship Council (No. 201706150054).

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Li, X., Zhang, M., Xia, X. et al. Corrosion Behavior of WC–10 wt % Ni3Al Composite in Acidic Media. J. Superhard Mater. 41, 345–354 (2019). https://doi.org/10.3103/S106345761905006X

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  • DOI: https://doi.org/10.3103/S106345761905006X

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