EXPERIMENTAL-STUDY OF PULSE WITH REVERSE PLATINGS ON NICKEL-IRON ALLOYS FROM SULFATE-SOLUTIONS

Effects of pulse operating parameters on nickel-iron electrodeposition have been studied at the rotating disc electrode (RDE). It is shown t hat for a specified pulse current density, a higher reverse current de nsity induces both lower average nickel and iron deposition rates indi cating that active dissolutions of both nickel and iron occur during t he reverse period. The effect of pulse frequency on the alloy composit ions depends on the disc rotation speed used ie, composition is strong ly affected by the mass transfer. The averaged deposition rates of nic kel and iron also depend on the plating baths used. Influences of vari ous compositions of plating baths on Ni-Fe deposition can be explained by electrode surface adsorption or solution complexation of the intro duced organic additives.