| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrode for electrolysis, which is used for high-speed zinc plating, and has durability particularly to a reverse current. SOLUTION: The electrode for electrolysis comprises: a substrate made of a valve metal; a coating layer containing particles of electroconductive titanium oxide, formed on the substrate surface; an intermediate layer containing 5 to 30 wt.% iridium oxide, and tantalum oxide, formed on the surface of the coating layer; and an electrode material layer mainly containing iridium oxide, formed on the surface of the intermediate layer. The electrode for electrolysis is used as an anode 18 in a metal-plating apparatus 11, has the durability to the reverse current given by the iridium oxide in the intermediate layer, even if cathodic polarization occurs during plating due to the flow of the reverse current, has an improved corrosion resistance of the substrate because the coating layer and the intermediate layer substantially cover the matrix of the valve metal, has an improved performance as an electrode, and leads to a stable electrolysis operation over a long period. COPYRIGHT: (C)2005,JPO&NCIPI
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