Microstructure and corrosion resistance of Ni/Cr₃C₂-NiCr composite coating

Abstract

Purpose

In this study, electrochemical deposition method which have cheaper equipment than thermal spraying methods and is available for the production of composite coatings were used.

Design/methodology/approach

Composite coatings were electrodeposited from a Watts's bath solution in which the suspended Cr₃C₂-NiCr particles were dispersed in the bath solution during deposition. Potentiodynamic polarization and electrochemical impedance spectroscopy techniques have been used to evaluate the corrosion resistance of the composite coating in the 3.5 Wt.% NaCl solution.

Findings

It was found that the submicron Cr₃C₂-NiCr particles distributed uniformly in the coating and depend on the current density of deposition, different amount of particles can be incorporated in the coating. The results showed that the corrosion resistance of the Ni/ Cr₃C₂-NiCr composite coatings is more comparable to the pure nickel coating.

Originality/value

Production of Ni-base composite coating from an electrolytic bath containing Cr₃C₂-NiCr particles is possible via electrodeposition.

Citation

Hosseinzadeh, M., Jafari, A.H., Mousavi, R. and Esmailzadeh, M. (2019), "Microstructure and corrosion resistance of Ni/Cr₃C₂-NiCr composite coating", Anti-Corrosion Methods and Materials, Vol. 66 No. 4, pp. 471-478. https://doi.org/10.1108/ACMM-02-2019-2079