Abstract
The present experimental work has been performed to optimize the process parameters of electroless Ni-P coating with the use of statistical modelling via Box–Behnken design of experiment. The concentration of nickel sulphate, concentration of sodium hypophosphite and the bath temperature have been chosen as process parameters which have to be optimized considering surface roughness as a response. Analysis of variance (ANOVA) method has been employed to determine the significant factors and significant interactions of the factors. The statistical model of Box–Behnken design (BBD) method has been successfully utilized to optimize the process parameters for surface roughness of the electroless Ni-P coating. Using the response surface model, the optimized conditions to minimize surface roughness have been determined. The surface roughness at optimized condition has been observed as 0.32 µm. The Ni-P-coated sample prepared at optimum condition has been characterized by energy dispersive X-ray spectroscopy (EDX) for compositional analysis and scanning electron microscopy (SEM) for explaining the surface morphology.
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