Characterization of microstructure and properties of electroless duplex Ni-W-P/Ni-P nano-ZrO2 composite coating. (March 2018)

• Record Type: Journal Article
• Authors: Luo, Hong; Leitch, Michael; Zeng, Hongbo; Luo, Jing-Li
• Is Part Of: Materials today physics. Volume 4(2017)
• Page Start: 36
• Page End: 42
• Publication Date: 2018-03
• Subjects: Electroless deposition -- Duplex coating -- Corrosion resistance -- Microstructure; Materials science -- Periodicals; Physics -- Periodicals; Electronic journals; 530.41
• DOI: 10.1016/j.mtphys.2018.03.001
• Languages: English
• ISSNs: 2542-5293

Abstract

Abstract: In this study, we prepared the Ni-W-P/Ni-P nano-ZrO2 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-ZrO2 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 H2 S/CO2 -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 H2 S/CO2 -containing environment. Graphical abstract: Cross-section image and EDX line analysis of duplex Ni-W-P/Ni-P nano-ZrO2 coating. Image Highlights: The ZrO2 nano-particles and duplex Ni-P matrix co-deposited homogeneously. Electroless nanoparticles and Ni composite coating is feasible. The coatings exhibits good corrosion resistance in the CO2 -H2 S environment.