Production process of metallic foil by electrolysis.

摘要

A process of producing a metallic foil by electrolysis is disclosed, which comprises using an insoluble electrode having an electrode active coating composed of a composite oxide of iridium and tantalum on an oxygen impermeable coating formed on a thin film-forming metal substrate as an anode and depositing impurities in the electrolytic bath on the anode at an anodic potential higher than the electric potential at which the impurities in the electrolytic bath form insoluble oxides on the anode.