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Microstructure and Electrochemical Properties of CoCrCuFeNiNb High-Entropy Alloys Coatings

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

The CoCrCuFeNiNb high-entropy alloys coatings were prepared by using plasma-transferred arc cladding process. The microstructure and electrochemical behaviors of the coating were investigated in detail. The experimental results indicated that the coating consists of a simple fcc solid solution phase and an order (CoCr)Nb-type Laves phase. The polarization curves, obtained in 1 and 6 mol/L hydrochloric acid solutions, clearly indicated that the general corrosion resistance of the coating at ambient temperature was better than that of 304 stainless steel. The coating displayed a lower corrosion current and lower corrosion rate. Electrochemical impedance spectroscopy demonstrated that the impedance of the coating was significantly higher than that of the 304 stainless steel.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (No. 51105129).

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Authors and Affiliations

  1. College of Mechanics and Materials, Hohai University, Nanjing, 210098, China

    Jiangbo Cheng & Dan Liu

  2. National Key Laboratory for Remanufacturing, Beijing, 100072, China

    Jiangbo Cheng, Xiubing Liang & Binshi Xu

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  1. Jiangbo Cheng
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  2. Dan Liu
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  3. Xiubing Liang
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  4. Binshi Xu
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Correspondence to Jiangbo Cheng.

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Cheng, J., Liu, D., Liang, X. et al. Microstructure and Electrochemical Properties of CoCrCuFeNiNb High-Entropy Alloys Coatings. Acta Metall. Sin. (Engl. Lett.) 27, 1031–1037 (2014). https://doi.org/10.1007/s40195-014-0117-4

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  • DOI: https://doi.org/10.1007/s40195-014-0117-4

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