Abstract
The pulsed electrodeposition method was applied for the preparation of Co and Co–Ni alloy. Pulse duty cycles of 5 to 80% at frequencies 10 to 100 Hz with current densities ranging from 2·5 to 7·5 A dm−2 were employed. The influence of pulse current density, duty cycle and frequency on the thickness and hardness of the Co and Co–Ni deposit were studied. Corrosion resistance of Co and Co–Ni alloy is compared in the present paper.