Zinc-nickel electrodeposits have been widely adopted for surface treatment of automobile body steel sheet for high corrosion resistance. This paper describes the morphology evolution of pulsed electrodeposited zinc-nickel binary alloys. With an increase in pulse current off-time, morphologies change from triangular-pyramidal-shaped crystals which are hexagonal columnar crystals to pyramidal-shaped crystals which are hexagonal columnar crystals with two independent c axes and then to pyramidal shaped crystals which are the hexagonal columnar crystals having granular crystals on their (10.0)eta.