STUDY ON HIGH-SPEED ELECTRODEPOSITION OF Ni-SiC COMPOSITE COATING IN CENTRIFUGAL FIELD

Utilizing self-made centrifugal high-speed electroplating equipment, the effects of technological parameters, such as temperature, pH value, current density, SiC content in electrolyte, and rotation speed of cathode, on SiC content in SiC/Ni composite coating are studied. The distribution of SiC particles in composite coating and the coating performance are also investigated. Experimental results show that temperature, current density, SiC content in electrolyte, and cathode rotation speed influence SiC codeposition volume obviously, while the pH value has little influence on SiC codeposition volume. SiC/Ni composite coating with well-distribution and high SiC codeposition volume can be prepared utilizing the centrifugal high-speed electeoplating equipment. The high codeposition amount of composite coating provides high hardness and wearability.