Voltage balance in electrolysis with insoluble anode of various kinds of material was studied. Testing apparatus was consisted of a glass vat for electrolytic cell, an iron plate for cathode, and a graphite-, platinum-, or magnetite-piece for insoluble anode.
The cell voltage and electrode potential according to the change of current density were measured using a valve voltmeter; the resistivity of each anode and specific conductivity of electrolyte using Kohlrausch-bridge.
Furthermore, the behavior of gas polarization on the surface of anode which might have something to do with the electrode potential was observed by microscopy.