Abstract
The metallurgical structure of Cd-Sb alloy is devided into three phases. They are α, β and γ solid solution. Since the corrosion potential of alloy consisting of two or more phases is represented in the one of the least noble phase, the potential of the interphase or the nobler phases cannot be observed by the normal method. The microelectrode system described in the previous report was applied in this case, and also the potentials of the nobler phases could be separately measured. A diffused layer of Cu into Zn was subjected to microelectrode inspection and it was discoverd that the layer was separated into three parts showing different potentials.
