Microstructure, Corrosion and Wear Resistance of Co-Ni-ZrO₂ Composite Coating

Abstract:

Co-Ni alloy and ZrO₂ submicron particles were successfully co-deposited on carbon steel substrate by direct current electrolytic deposition. The micromorphology, constituent, microhardness, corrosion and wear resistance of the composite coatings were tested, respectively. The results show that the embedded submicron ZrO₂ particles are uniformly distributed in the entire Co-Ni matrix and the coating showed a good adhesion to the substrate. The hardness, friction coefficient, wear loss, and electrode voltage of Co-Ni alloy coating were 356 HV, 0.8, 1.901×10^-2 mg/m, and-0.47 V, respectively, while those of Co-Ni-ZrO₂ composite coating were 413 HV, 0.6, 1.174×10^-2 mg/m, and-0.37 V, respectively. The data above suggested that Co-Ni-ZrO₂ composite coating possesses higher microhardness, better wear and corrosion resistance.

• Periodical: Materials Science Forum (Volume 817)
• Pages: 449-453
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.817.449
• Online since: April 2015
• Authors: Jun Gao, Wan Chang Sun*, Qin Shi, Ying Wang, Miao Miao Tian
• Keywords: Composite Coating, Co-Ni-ZrO₂, Corrosion Resistance, Electrodeposition, Microhardness, Wear Resistance

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