Development of mathematical model to evaluate microstructure and corrosion behavior of electroless Ni–P/nano-SiC coating deposited on 6061 aluminum alloy

In this study, the effect of surfactant, phosphorus content, and concentration of SiC nanoparticle on the microstructure and protective performance of electroless Ni–P/nano-SiC coating was studied using electrochemical impedance spectroscopy as well as surface analysis. Through taking advantage of response surface methodology, the experimental results were fed into Design Expert software which then mutual relationships between three independent variables were established. Prediction of model at the experimental range using systematic data enables us to provide a better understanding of the simultaneous effect of variables on the properties of coating. Moreover the optimum concentration of variables was predicted.