Electrodeposition of Nickel-Cobalt Alloys from the Pyrophosphate Bath

Abstract

Nickel has been codeposited with cobalt from the pyrophosphate bath. Detailed studies on alloy composition, cathode efficiency, and potential have led to the optimum conditions for obtaining satisfactory alloy plates with 10–91% nickel. The efficiency of cast alloy anodes is quite high. X‐ray patterns of the deposits show the existence of f.c.c. and hexagonal structures. The deposit composition could be altered appreciably only by varying the metal content of the bath.