Incorporation of Y2O3 nanoparticles and glycerol as an appropriate approach for corrosion resistance improvement of Ni-Fe alloy coatings

摘要

Ni-Fe coatings have been recently developed to use for various industrial applications; however, their relatively inappropriate corrosion resistance have restricted their beneficial usage. This study aims to improve the corrosion -resistance of Ni-Fe coatings through incorporation of Y2O3 nanoparticles as reinforcing agent accompanied by glycerol as an electrolyte additive. Field emission scanning electron microscope (FE-SEM), energy dispersive spectrometer (EDS), and X-ray diffraction (XRD) were used to assess the surface morphology, chemical composition, and constituent phases, respectively. Furthermore, electrochemical impedance spectroscopy (EIS), Tafel polarization, and open circuit potential (OCP) measurements were employed to study the corrosion behavior of the fabricated coatings. Results proved that the corrosion resistance of the coatings improves with incorporation of Y2O3 nanoparticles. Ni-Fe-4 g/L Y2O3 coating exhibits the best corrosion behavior due to its higher Y2O3 content. Altogether, results demonstrated that the volume fraction of the Y2O3 is the governing factor exerting a determining role in the corrosion behavior of the coatings.