Characterization of microstructure and properties of electroless duplex 
Ni–W–P/Ni–P nano-ZrO2 composite coating

Luo, Hong; Leitch, Michael; Zeng, Hongbo; Luo, Jingli

doi:10.1016/j.mtphys.2018.03.001

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Characterization of microstructure and properties of electroless duplex Ni–W–P/Ni–P nano-ZrO₂ composite coating

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Luo, Hong
Mechanism-based Alloy Design, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;
Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada;

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Citation

Luo, H., Leitch, M., Zeng, H., & Luo, J. (2018). Characterization of microstructure and properties of electroless duplex Ni–W–P/Ni–P nano-ZrO₂ composite coating. Materials Today Physics, 4, 36-42. doi:10.1016/j.mtphys.2018.03.001.

Cite as: https://hdl.handle.net/21.11116/0000-0003-A2B7-7

Abstract

In this study, we prepared the Ni-W-P/Ni-P nano-ZrO 2 nanocomposite coating by electroless chemical deposition methods. The structures, morphologies, and corrosion behavior of the nanoparticle enhanced duplex coating were evaluated by X-ray diffraction, atomic force microscopy, scanning electron microscopy as well as the electrochemical methods, such as the potentiodynamic polarization curve and electrochemical impedance spectroscopy. The Ni-W-P/Ni-P nano-ZrO 2 duplex coatings were amorphous under the as-plated condition and crystallized and produced nickel borides upon heat-treatment. The duplex coatings exhibit the higher microhardness after different heat treatments and also depict the better corrosion resistance than conventional Ni-P coating in the H 2 S/CO 2 -containing environment. This novel type of Ni-P coating possesses both excellent mechanical properties and good corrosion resistance, and it would expand their scope of applications in H 2 S/CO 2 -containing environment. © 2018 Elsevier Ltd