silver coating
3.Full bright electroless nickel-tin-phosphorus plating process instead of traditional double silver dip-coating process for piezoelectric ceramic tablets was presented. It is satisfactory with low cost, good weldability, high production efficiency and excellent appearance.
4.HA/Ag composite coatings were prepared by two step electrodeposition in aquatic electrolytes containing calcium and phosphate ions and subsequently electroplating of silver in nicotinic acid bath. The influence of different working process on the content of silver in the coating, the influences of silver plating on the bonding strength and composition and structure of coating were investigated.

