ELECTRODEPOSITION BEHAVIOR OF ZINC-IRON GROUP METAL-ALLOYS FROM A METHANOL BATH

Electrodeposition of zinc-iron-group metal alloys is carried out in a methanol bath. The effects of different parameters. such as bath compo sition and current density on current efficiency and alloy composition are investigated. Partial polarization curves of zinc and nickel are measured for both alloy and single metal deposition to evaluate the co deposition behaviour of zinc-iron-group metal alloys. Attempts are als o made to confirm the proposed hydroxide suppression mechanism explain ing the anomalous type of codeposition of zinc-iron-group metal alloys by investigating the role of water in the electroreduction process of zinc and iron-group metal ions.