| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a device for performing non-drainage recovery type electrogalvanizing without deteriorating plating performance. SOLUTION: Electrogalvanizing is performed in a plating bath provided with an insoluble anode 4 isolated by a cation exchange membrane 6 and a soluble anode 3, the object 5 to be plated after the plating is successively washed by water washing tanks 8 to 10, and the stuck plating liquid carried out from the plating bath is recovered. By the isolation of the inert anode, the decomposition of salt and organic matter on the insoluble anode is prevented. The washing water in the water washing tank is successively fed to the water washing tank in the prestage. The washing water within the washing tank 8 on the forefront stage and/or a part of the plating liquid 1 is concentrated by a concentrator 7, and is returned to the plating bath. By using benzylideneaceton as a brightener, during the concentration, the decomposed product thereof at a cathode can be evaporated, so as to be removed, thus, even if the recovery of the plating liquid is repeated, the accumulation of the decomposed product in the plating liquid can be prevented. COPYRIGHT: (C)2007,JPO&INPIT
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