Optimizing cathodic electrodeposition parameters of ceria coating to enhance the oxidation resistance of a Cr2O3-forming alloy

By Wang, Xu; Fan, Fan; Szpunar, Jerzy A.
Published in Thin Solid Films NULL 2016

Abstract

Abstract Nano-ceria coating was deposited onto a chromium oxide forming alloy through galvanostatic cathodic electro-deposition method in cerium nitrate electrolyte. The electrochemical behavior and influence of main deposition parameters of current density, deposition time, and temperature were studied. It was seen that the crystal size decreased with increasing of current density while micro-cracks were also observed at higher current density. Slightly increasing of crystal size and smoothing of surface morphology were seen with increasing of deposition time. It was reported that the bath temperature has the most significant effect on crystal size and surface morphology of the deposit. Green rust as corrosion product was also observed with deposition temperatures higher than 35

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