Characterization of Cr-Ni-ZrO₂ Composite Coatings Electrodeposited from Cr(III) Plating Bath

Abstract:

New Cr-Ni-ZrO₂ composite coatings are prepared by composite electrodeposition. The morphology, composition and corrosion resistance of as-deposited Cr-Ni-ZrO₂ coatings are systematically characterized by means of SEM, EDS. The hardness of as deposited and annealed Cr-Ni-ZrO₂ coatings are also discussed. The electrochemical corrosion tests are conducted by means of Tafel plots. Results of SEM and EDS show that Cr-Ni-ZrO₂ composite coatings with homogeneous and crack-free morphology have been prepared successfully; the mass proportion of Zr in the as-deposited coatings is up to 7.85%. The hardness values of Cr-Ni-ZrO₂ coatings are higher than that of Cr-Ni alloy coatings. Furthermore, the hardness values increase and then decrease with the temperature increasing when annealed. Analysis of Tafel plots demonstrates that Cr-Ni-ZrO₂ coatings have much better corrosion resistance than that of Cr-Ni coatings.

• Periodical: Advanced Materials Research (Volumes 239-242)
• Pages: 2733-2737
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.239-242.2733
• Online since: May 2011
• Authors: Xiang Zhu He, Xin Li Zhou, Xiao Wei Zhang, Xin Sun
• Keywords: Cr-Ni Alloy, Cr-Ni-ZrO2 Composite Coatings, Electro-Deposition, Nano-ZrO₂ Particle, Trivalent Chromium

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