Electrodeposition of Ni matrix composite coatings containing ZrC particles

Abstract

In this paper, Ni matrix composite coatings containing either micro-ZrC or nano-ZrC particles were successfully prepared by direct current electrodeposition. The microstructure of the coatings, including crystallographic texture and grain size, were studied by X-ray diffraction analysis. Energy dispersive spectrometer and scanning electron microscope were used to investigate the chemical composition and morphology of the coatings. The microhardness of the coatings was measured by a Vicker microhardness tester. Grain refinement strengthening and dispersion strengthening mechanisms were applied to interpret the evolution of the microhardness. The corrosion resistance of the Ni matrix composite coatings was investigated by corrosion polarisation method. The composite coatings exhibit better mechanical property and corrosion resistance than pure Ni coating.