Patent ID: 8617377
Filing Date: 2013-12-31
Classification: C23C,C25B,C25C

Abstract:
1. A method for a metal electrowinning comprising: precipitating a metal from a metal chloride solution in a bath provided with an anode for electrolysis, wherein said anode comprises a substrate comprising titanium or titanium alloy, and a coating comprising a plurality of unit layers, provided on a surface of the substrate, each of the unit layers comprises a first coating layer comprising a mixture of iridium oxide, ruthenium oxide and titanium oxide, and a second coating layer comprising a mixture of platinum and iridium oxide, the first coating layer of one of the unit layers formed on the surface of said substrate is in contact with the surface of said substrate, in each unit layer, the second coating layer is formed on the first coating layer and one of the second coating layers is formed as an outmost layer of the coating, and said coating is provided on the surface of the substrate by a thermal decomposition baking method, followed by post-baking at a baking temperature higher than that of the thermal decomposition baking method.