PURPOSE: To measure highly precisely a polarization without any leakage by connecting a vessel for supplying electrolyte to one end part of a double tube, providing a double cylinder to another end part through a connecting valve, pressing an opening part for measurement, and pouring the electrolyte into the double cylinder.
CONSTITUTION: A liquid 2 in an electrolytic cell is allowed to flow into the vessel 11 for supplying electrolyte through an inner tube 9b, by closing a connecting valve 19 and driving a pump 13. The liquid 2 is sent to the connecting tube 19 provided at another end part 10b of the double tube 10 from a supplying hole 8a of an outer tube 8, and returns to an electrode vessel 1 through an inner tube 9a. Next, if the measuring opening part 22a of the double cylinder 22 is brought into contact with a material W to be measured through a packing 23 and pressed, the valve 19 is opened by this operation. Thus, the liquid 2 flows down through an outer cylinder 20, then impinges on a surface of the material W and returns. An opening or closing valve 17 is opened, gaseous nitrogen of a deaeration apparatus 16 is bubbled in the liquid 2 for deaeration, driving of the pump 13 is stopped at a time point when the dissolved oxygen concn. of the liquid 2 is lowered to a suitable value, and the polarization is measured.
SHIYOUJI TETSUO
SAITOU KIYOSHI
MURAMATSU MASAMITSU
SHIYOUJI TETSUO
TOSHIBA KK