Coated electrode and a method of its production

A coated electrode having excellent electric conductivity and resistance against corrosion is obtained by electrodepositing lead dioxide on the surface of an alloy which consists of lead and silver. Prior to electrodepositing lead dioxide, the alloy is anodically oxidized beforehand in a solution of sulfate such that the surface of the alloy is oxidized. This enables the lead dioxide to be electrodeposited even in an acidic electrolyte.