抄録
The evident limitation of the possible bath-voltage and current to cause a passive state on thesurface of the anode are shown in Fig 4 and Fig 7, respectively, after careful observation of each state of the bath-voltages and currents which were diversely changed by circling lime of current while a constant bath-voltage on the A-Vcurve measured with the electrodes of zinc wire were applied to such provided solutions of plating as zinc sulphate, sulphric acid and zinc acid, severally.
According to the electrodes of zinc wire used for this experimentation, there was a distinct fact that the zinc sulphate solution of more than 12% was required so as to raise up the change of state within 10 minutes at 6V, and above the 32% of the solution, the changes were much more vehement. It was also interesting to observe that the typical change of state was found in above the 45% of zinc sulphate solution, as the similar fact was also seen in case of the: 27% of cupper sulphate solution.
There came to clearly appear the important fact as to the sulphric acid solution, in the same manner, that a short circling time and low bath-voltage were the cause of the changes of state in accodiance with the increasing of concentration, and there was no converse process as a subsequent phenomenon in this experiment: the decreasing of bath-voltage and increasing of current.
In addition to these facts mentioned, there are in this report, such subsidiary descriptions in details as the situations on the outbreak of gas or form, and the changes of state on the surface of each electrode.
