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Open AccessArticle

Synthesis and Characterization of Ni–W/Cr2O3 Nanocomposite Coatings Using Electrochemical Deposition Technique

1
College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
2
Guanyun Research Institute for Modern Agricultural Equipment, Nanjing Agricultural University, Guanyun 222200, China
3
Ministry of Agriculture and Rural Affairs, Nanjing Research Institute for Agricultural Mechanization, Nanjing 210000, China
*
Author to whom correspondence should be addressed.
Coatings 2019, 9(12), 815; https://doi.org/10.3390/coatings9120815
Received: 21 October 2019 / Revised: 22 November 2019 / Accepted: 28 November 2019 / Published: 2 December 2019
(This article belongs to the Special Issue Corrosion Science and Surface Engineering)
Ni–W/Cr2O3 nanocomposite coatings were synthesized from aqueous sulphate-citrate electrolyte containing Cr2O3 nanoparticles on a steel surface using conventional electrodeposition technique. This study was aimed at investigating the influence of Cr2O3 nanoparticle content on the microstructure, corrosion resistance, and mechanical properties of electrodeposited Ni–W/Cr2O3 nanocomposite coatings. Ni–W binary alloy coatings were deposited and optimized before addition of the nanoparticles to produce high-quality coatings. The microstructure and chemical composition of the Ni–W/Cr2O3 nanocomposite coatings were evaluated using scanning electron microscope (SEM), energy dispersive X-ray spectrometer (EDS), and XRD. Corrosion resistance properties were evaluated using potentiodynamic polarization (Tafel) measurements in 3.5 wt.% NaCl medium. The corrosion resistance and microhardness are significantly higher in Ni–W/Cr2O3 nanocomposite coatings compared to pure Ni–W binary alloy and increase with the increase in content of Cr2O3 nanoparticles in the coatings. Wear resistance is also higher in Ni–W/Cr2O3 nanocomposite coatings.
Keywords: nanocomposite coatings; conventional electrodeposition; corrosion resistance; microhardness; wear resistance nanocomposite coatings; conventional electrodeposition; corrosion resistance; microhardness; wear resistance
MDPI and ACS Style

Mbugua, N.S.; Kang, M.; Zhu, J.; Liu, Y.; Zhang, Y.; Ndiithi, N.J. Synthesis and Characterization of Ni–W/Cr2O3 Nanocomposite Coatings Using Electrochemical Deposition Technique. Coatings 2019, 9, 815.

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