Patent ID: 8337958

Claim:
A manufacturing process of the electrodes for electrolysis, characterized by; the process to form an arc ion plating undercoating layer (hereafter called the AIP undercoating layer) comprising valve metal or valve metal alloy containing crystalline tantalum component and crystalline titanium component on the surface of the electrode substrate comprising valve metal or valve metal alloy by the arc ion plating method (hereafter called the AIP method), the heat sintering process by heat sintering the said electrode substrate to transform tantalum component only of the AIP undercoating layer comprising valve metal or valve metal alloy containing crystalline tantalum component and crystalline titanium component into amorphous substance, and the process to form electrode catalyst layer on the surface of said the AIP undercoating layer comprising valve metal or valve metal alloy containing tantalum component transformed to amorphous substance and crystalline titanium component.