Electroless nickel composite (Ni-P/SiC) coating - A study on interface and corrosion characteristic

M. Franco, W. Sha, S. Malinov

Research output: Contribution to conferencePoster

Abstract

Surface behaviour is of paramount importance as failure and degradation tend to initiate from the surface. Electroless composite coating (NiP/SiC) was developed using SiC as reinforcing particles. As heat treatment plays a vital role in electroless nickel coating owing to the changes in microstructure, phase structure and mechanical properties, an insight at the interface changes in chemistry and micromechanical behaviour was investigated using scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) and microindentation techniques. Corrosion performance was analysed using electrochemical impedance spectroscopy (EIS). Absence of zinc and migration of copper at the interface was detected. Brittleness and microcracks was seen long the interface when indenting at load of 500 gf (Vickers). Corrosion performance is weaker than particles free coating. However, a thin blanket of NiP could enhance the resistance to corrosive medium.
Original languageEnglish
Publication statusPublished - 13 May 2015
EventE-MRS 2015 Spring Meeting, Symposium: EE Protective coatings and thin films - Lille, France
Duration: 11 May 201515 May 2015

Conference

ConferenceE-MRS 2015 Spring Meeting, Symposium: EE Protective coatings and thin films
CountryFrance
CityLille
Period11/05/201515/05/2015

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