Journal of Superhard Materials

, Volume 41, Issue 5, pp 345–354 | Cite as

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

  • Xiaoqiang Li
  • Minai ZhangEmail author
  • Xiaojian Xia
  • Ting Cao
  • Liang Liang
  • Huiyun Li
Production, Structure, Properties


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.


WC–10Ni3Al composite intermetallics corrosion polarization pseudopassivity 


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Copyright information

© Allerton Press, Inc. 2019

Authors and Affiliations

  • Xiaoqiang Li
    • 1
  • Minai Zhang
    • 1
    • 2
    Email author
  • Xiaojian Xia
    • 1
  • Ting Cao
    • 1
  • Liang Liang
    • 1
  • Huiyun Li
    • 3
  1. 1.Guangdong Key Laboratory for Advanced Metallic Materials Fabrication and FormingSouth China University of TechnologyGuangzhouChina
  2. 2.Chemical Engineering and Materials ScienceUniversity of CaliforniaIrvineUSA
  3. 3.Dongguan hyperpowder Co. Ltd.DongguanChina

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