Abstract
Studies were made on the electrodepositions of copper from sulfate or cyanide baths and silver from cyanide bath under ultrasonic vibration. Discussions were made on the difference between presence and absence of ultrasonic vibration on the current-potential curves and the current efficiency-current density curves. It was observed that polarization was appreciably decreased owing to the reduction of diffusion polarization by the application of ultrasonic vibration. It was also observed that surface roughness and grain size of the deposited layer were improved by its application. These effects were particularly remarkable in silver deposition from cyanide baths, where the current density for operation was considerably increased under ultrasonic vibration for reducing the deposition time.
