Effect of Grain Composite Electrodeposition on Roughness of Metal Surface

In this paper,the intermediate layer prepared with electrodepositing of nickel and super hard particles was then chromed.Parameters,including current density and temperature,were studied in the experiments.Surface roughmeter and SEM were used to obtain the roughness data and micrograph of the surface.The experimental results showed that preferable roughness could be achieved with temperature of 50 ℃,current density of 5 A/dm² and pH of 4.8.From the SEM micrograph,it could be seen that the particles on the surface were uniformly distributed.Difference in electrodepositing time induced different nickel content which affected the binding force.The chromed metal surface showed preferable hardness and roughness（2~4 μm）.