A nickel-yttrium(III) oxide nanocomposite has been electrodeposited onto various metal substrates using varying concentrations of yttrium(III) oxide nanoparticles in the nickel plating bath. In this environment, nickel tends to naturally absorb onto the surface of the yttrium(III) oxide nanoparticles which leads to agglomeration of the nanoparticles in the electrolyte solution. Citric acid has been added to the electrolytic bath, not only as a buffer to aid in controlling the pH of the system, but also as a stabilizing agent for the nanoparticles prior to deposition. The effect of citric acid on the formation, morphology, and composition of the nickel-yttrium(III) oxide coatings was investigated by powder x-ray diffraction (XRD), scanning electron microscopy (SEM), and x-ray photoelectron spectroscopy (XPS). The corrosion resistant properties of the coatings were investigated by exposure to chloride solutions, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS). The addition of Y2O3 nanoparticles was found to enhance the mechanical properties of the coatings which leads to an inherent improvement in their corrosion resistance.

Effects of citric acid on the mechanical and corrosion properties of Ni-Y2O3 coatings for enhanced corrosion protection

2019 Spring National Meeting

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