Parametric Optimization of Electroless Ni-P Coating using L9 Orthogonal Arrays
Coatings are one of the rising techniques to stop degradation of metals’ surface from corrosive pitting and wear.
Electroless Ni-P coatings were developed and successfully deposited over Copper substrate. The coating was varied by
varying the concentration of the metal source, Nickel Sulphate and the reducing agent, Sodium Hypophosphite. The
corrosion rates of all the coatings were measured using Tafel Tests. Taguchi modelling was done with the help of L9
orthogonal arrays with corrosion rate as the response parameter. The optimized sample was obtained based on the Signal to
Noise ratio of individual levels of the coatings. The level 1 and level 3 of the above mentioned factors were the optimized
parameters. The optimized sample was characterized using Energy-Dispersive X-Ray Analysis, Scanning Electron
Microscopy. Energy-Dispersive X-Ray Analysis showed the Ni-P coating was a medium Ni-P coating.