亜鉛-亜鉛電解液間の界面インピーダンス
亜鉛電解における電解液中の不純物の影響
1973 年 89 巻 1027 号 p. 611-616
詳細
1973 年 89 巻 1027 号 p. 611-616
Effects of impurities, such as Ge, Co and In, on the potential dependence of the interfacial impedance at the solid zinc-acidic zinc sulfate solution were measured with an impedance bridge under the presence of the d.c. potentiostatic polarization.
The results obtained are as follows:
1) When 0.1mg/l Ge or 1-10mg/l Co is contained in the above mentioned electrolyte, marked increases in the interfacial capacitance and decreases in the interfacial resistance are observed over the range from the potential of zinc corrosion to that of zinc deposition.
2) The addition of 10mg/l In does not have influence on both the polarization curve and the impedance potential relation, which are similar to the results for the pure electrolyte.
3) It has been found that the interfacial impedance is closely related to the critical current density of zinc deposition and decreases with the increase of impurity which has the tendency to raise the critical current density.
