| 摘要 |
PURPOSE:To prevent the damage of an ion exchange membrane during electrolysis at high current density by using a sintered Ti body having a specified porosity as an electrode substrate and by unitedly forming a Ti layer having a lower porosity on the part of the substrate brought into contact with the ion exchange membrane so as to reduce ohmic loss due to defective contact. CONSTITUTION:An electrode substrate 1 is made of a sintered Ti body having 40-80% porosity and a Ti layer 2 having a lower porosity than the substrate 1 is unitedly formed on the part of the substrate 1 brought into contact with an ion exchange membrane 3 by sintering or other method. The thickness of the Ti surface layer is regulated to about 50mum-1mm. The density of contact points between the resulting electrode and the membrane 3 is increased and the moderate supply of an electrolytic soln. to the membrane 3 is ensured. Accordingly, electrolysis at high current density is enabled and the damage of the membrane 3 is reduced because uniform pressure is applied to the membrane 3.
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