This paper aims to improve the tribocorrosion properties of 316L, thus WC/Ni60 coated 316L was prepared by thermal spraying technique.
Composition and microstructure of WC/Ni60 coating was investigated, and tribological properties of 316 L and WC/Ni60 coating were studied under dry sliding, deionized water and artificial seawater.
The results showed that WC/Ni60 coating was lamellar structure, and the phase composition consisted of γ-Ni solid solution, carbides and borides. Furthermore, the hardness and corrosion resistance of 316 L in static seawater and wear resistance in dry sliding were improved by WC reinforced nickel-based coating. Furthermore, tribocorrosion results demonstrated that wear resistance of WC/Ni60 coating was also significantly better than 316 L, especially for higher load at artificial seawater. The reason can be attributed to the fact that the passive film of WC/Ni60 coating consisted of tungsten carbide, Ni(OH)2 and FeOOH for WC/Ni60 coating and only FeOOH for 316 L.
According to this study, it can be concluded that WC phases acted as a role in resisting the wear damages. Meanwhile, Ni-based materials performed well in corrosion resistance. Thus, the combined-effect Ni-based alloys and WC phases in WC/Ni60 coating showed better tribocorrosion performance than 316 L.
The authors acknowledge the financial supports by the National Natural Science Foundation of China (51705415), Natural Science Basic Research Plan in Shaanxi Province of China (2018JM5072), Ningbo Municipal Nature Science Foundation (2017A610007), Foundation of Key Laboratory of Marine Materials and Related Technologies, CAS (2018K01), National Key R&D Program (2016YFB0300604), Key Innovation Team of Shaanxi Province (2014KCT-04) and the Major International Joint Research Program of Shaanxi Province (2012KW-10).
Liu, E., Zhang, Y., Wang, X., Zeng, Z., Du, H. and Qin, H. (2019), "Tribocorrosion behaviors of thermal spraying WC/Ni60 coated 316L stainless steel in artificial seawater", Industrial Lubrication and Tribology, Vol. 71 No. 6, pp. 741-748. https://doi.org/10.1108/ILT-12-2017-0386
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