Electroless nickel plating process in small bulk plating solution

The effects of concentration ratio of main salt and reducing agent, temperature, pH, and reaction time on the deposition rate of electroless nickel on irregular-shaped Y1Cr18Ni9 stainless steel substrate in a ca. 2 mL plating bath were studied. The results showed that the deposition is fast under the conditions of Ni2+ to H 2 PO2- concentration ratio 0.75:1, temperature 77 °C, pH 6 and reaction time 2 h. The electrolessly deposited nickel coating is uniform and compact with a nickel content exceeding 72%.