抄録
Co-Zn alloy deposit was obtained from ambient-temperature molten-salt electrolytes, CoCl2-ZnCl2-BPC systems, and from organic-solvent added baths. The Co content in the Co-Zn alloy deposit was continuously controlled from 0 to 100wt% by controlling the bath composition and the current density. The morphology and the current efficiency of the Co-Zn alloy deposit were significantly improved by the addition of an organic solvent, i. e., propylene carbonate and ethyl alcohol, to the bath. The bath temperature could also be decreased from 130°C to 25°C by adding organic solvent. We assumed that the crystal structure of the Co-Zn alloy deposit changes from the binary phase of Zn and an intermetallic compound, Co5Zn21, to that of Co and an intermetallic compound with Co content in the deposit. We predict that the amorphous deposit of Co-Zn can be obtained from this molten-salt electrolyte.
