Nickel plating on steel by chemical reduction

A process has been developed for the production of adherent nickel deposits of good quality on steel without the uSe of an electric current.The deposition of nickel is brought about by chemical reduction of a nickel salt with hypophosphites in a hot ammoniacal solution.The reaction is catalytic and, under the prescribed conditions of concentration and pH, no reduction occurs in the solution unless certain metals, such as steel or nickel, are introduced into the bath.The reduction then occurs only at the surface ot the immersed metal with the production of a coating of nickel of 96 to 97 percent purity.Plating by Che:mical Reduction 693841-46-5 Furthermore, the object being plated, which was a tube with an inside anode, was found to have been completely plated on the outside, although no external anodes had been used.Although this process will not replace electrodeposition of nickel, it may prove useful for special applications.