Abstract
Nickel was electroplated with direct current, sinusoidal current, and three kinds of pulsed current. A ferroxyl test was conducted to measure the porosity of deposits. When the pulse waveform was composed of 16ms deposition and 4ms rest, porosity was about 1/10 less than porosity of deposits by direct current. Then a solid state switching circuit was designed and tested to provide this pulse waveform by connecting in series with an ordinary power supply.
