For the first time, functionally ZrO2 content graded Ni–ZrO2 composite coating has been successfully co-electrodeposited from a bath with gradually increasing stirring rate. For this, different composite coatings were electroplated in the same bath with different stirring rates to find the optimum stirring rate in which the maximum content with uniform distribution of ZrO2 particles in the coating can be achieved. To produce ZrO2 content graded Ni–ZrO2 composite coating, the stirring rate was continuously increased from 0 to optimum value. The results showed that functionally graded Ni–ZrO2 composite coating has been successfully electroplated with continuous gradient distribution of Zirconia content in the coating using controlling of bath stirring rate. With increasing of ZrO2 particles content, the microhardness increases from the interface towards the surface of the coating. This could provide a high wear resistance with high adhesion of the coating to the substrate.
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