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

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, corr...

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Bibliographic Details
Published in:Coatings (Basel) 2019, Vol.9 (12), p.815
Main Authors: Mbugua Nyambura, Samuel, Kang, Min, Zhu, Jiping, Liu, Yuntong, Zhang, Yin, Ndiithi, Ndumia Joseph
Format: Article
Language:English
Subjects:
Alloys
Binary alloys
Chemical composition
Chromium oxides
Coated electrodes
Composite materials
Corrosion resistance
Electrolytes
Evaluation
Experiments
Mechanical properties
Microhardness
Microstructure
Nanocomposites
Nanoparticles
Powder metallurgy
Protective coatings
Wear resistance
X ray spectrometers
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Summary: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.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings9120815