Abstract
The bipolar couple-electrode method, in which the potential difference between a pair tiny electrodes placed on the cathode surface is measured, was investigated as a means of determining current density distribution in plating baths of Cu, Ni, Zn and Cr. The potential difference showed good linearity with the current density calculated from the thickness of the deposits by using two electrodes made of the same metal as the deposits in the solution. No linearity was found in systems which used platinum electrodes.
