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Thin layer coating of metals will improve the mechanical properties. Cu-Ni-P-W composite coatings were prepared by means of coating a thin film on the above of Al-6063 alloy. The aim of this composite coating is to improve the micromechanical properties such as sliding wear resistance and hardness of the Al. The microstructure of coated Al-6063 material was analyzed to determine such that properties. Due to slight increase in P and W content, the grain size refined gradually and the micro-hardness increased. However, on heat treatment, the composite coating exhibits improved wear resistance and better micro-hardness of the coated Al. Also the mechanical properties and tribological study of the coated material were analyzed by various tests such as wear, friction, hardness and surface roughness test and the results were compared and validated with Cu-Ni-P, Cu-Ni-P-W composite coatings. Hence the results shows that Cu-Ni-P-W composites possess higher hardness, better corrosion resistance, good wear resistance, and low coefficient of friction. Keywords— Al-6063, Electroplating, Cu-Ni-P-W composite coating, Micro-hardness, sliding-wear

Electrodeposition of Cu-Ni-P-W Composite on Al-6063 Substrate