Preparation method of chemical nickel-plating activation solution

A Ni-P alloy plating liquid contains Ni salt (0.5-6 wt.%), sodium hypophosphite (0.5-4), complexing agent (0.5-6), water (87-92) and stabilizer (rest). Its plating process includes such steps as ultrasonic treating to workpiece for 2-4 min for removing rust and oil, washing, immersing in weak acid for acid frosting, activating, washing, plating at 45-95 deg.C for 0.5-6 hr, washing, baking in high-temp oil at 90-180 deg.C. Its advantages are no poison, no corrosion, and high resistance to wear, corrosion and high temp for plated workpiece.

Li Longbao

Papers

Nickle-phosphorus alloy plating liquid and coating method