Abstract
Characeristic properties of the alkaline nickel plating bath containing nickel-triethamolamine complex under various conditions have been studied.
As to the configuration of this complex, six-dentate structure shown in Fig 5 has been proposed.
To the electrolyte, NiCl2 6H2O and H3BO3 were added for the purpose of increasing nickel anode corrosion and regulating pH value. Bright deposit was obtained at room temperature with current density of 2A/dm2, whereby the cathode current efficiency was 50-60%.
The potential polarization curve obtained by plotting cathode potentials against current density at 25°C, showed abrupt change at about 3.5A/dm2 to more basic side. This point of flexure corresponded to the highest limit of current density allowable to give a satisfactory deposition.
Further studies would be required to elucidate the plating mechanism from this bath.
