Morphology Evolution of Zinc‐Nickel Binary Alloys Electrodeposited with Pulse Current

Abstract

Zinc-nickel electrodeposits have been widely adopted for surface treatment of automobi le body steel sheet for high corrosion resistance. This paper describes the morpho logy evolution of pulsed electrodeposited zinc-nickel binary alloys. Wi th an increase in pulse current off-time, morphologies change f rom tr iangular-pyramidal-shaped crystals wh ich are hexagonal co lumnar crystals to pyramida l-shaped crystals wh ich are hexagonal co lumnar crystals with two independent c axes and then to pyramidal shaped crystals wh ich are the hexagonal co lumnar crystals having granular crystals on their (10-0%