Study of friction and wear characteristics of ni tio2 and ni sic nanocomposite coatings by pulse plating method

Abstract

In recent years, tremendous research has been carried out for newlinesubstitutes for hard chrome plating s for many industrial applications like newlineaerospace, automobile, oil, and gas, and many engineering industries. The newlinechromium coating process involves the liberation of chromium hexavalent newlinecomponents during the electroplating process, which causes many problems newlinefor human beings, like respiratory problems, eye irritation, and cancer. Also, newlinedisposing of the electrolyte in a landfill pollutes the environment, so special newlinecare will be taken while operating the plating process, and disposal needs newlinespecial treatments, which in turn, excessive amounts be utilized. Hence this newlineproblem has been seriously viewed by many countries, which ban the use of newlinechromium platings. As a result, alternate coatings for chromium replacement newlinemust be identified to solve this problem. newlineThis research work was carried out to find the alternate coatings for newlinechromium replacement with Ni-TiO2 and Ni-SiC nanocomposite coatings on newlineAISI 304 stainless steel substrate using the pulse electrodeposition method newlinethat matches the hard chrome plating s performances. To achieve better newlinenanocomposite coating on the AISI 304 stainless steel substrate, the newlineparameters such as current density, frequency, and duty cycle parameters have newlinebeen optimized using response surface methodology. The technique predicts newlinethat the optimal frequencies, duty cycles, and current densities for coating newlineNi-TiO2 are 10 Hz, 14.24%, and 0.26 A/cm2 newline, and for coating Ni-SiC, 14.64 Hz, newline30%, and 0.23 A/cm2 newline, respectively. newline