Abstract: Auto-brush electroplating technique and equipment are studied, a particular description of design and application of the process control expert system is given. The expert system includes a database for keep data, expert program for self-study and operation program for application. Auto-brush electroplating technique made good application gains with the expert system. The nano-composite coating containing n-SiC/Ni is prepared. As compared with manual-coating, the auto-coating’s surface morphology is flatter and more compact, size of the grain formed the surface is smaller and average. The structure of auto-coating is denser than the manual-coating’s. The auto-coating’s wear resistance is more excellent and the micro-hardness improves 8% than the manual-coating’s.

Key words: Auto control, Auto-brush electroplating, Expert system