| 摘要 |
PURPOSE:To remarkably enhance the stability of an electrode in the electrolytic treatment of a metal plate, by allowing a part of the current of an auxiliary electrode to shunt in a system using an asymmetric alternating wave form current to perform cntrol so as to form the stable condition of a graphite electrode. CONSTITUTION:A metal web 1 is guided to an auxiliary electrolytic cell 15 and, thereafter, guided to an electrolytic cell 4 to be transferred to the outside while horizontally conveyed in the cell 4. In addition, the web 1 is guided to a separate auxiliary electrolytic cell 25 through pass rolls 23, 24 and transferred out of the cell 25. Insoluble anodes 20, 30 each comprising platinum are respectively provided in the cells 15, 25 at positions opposed to the web 1 as auxiliary electrodes. An asymmetric alternating wave form current is flowed to the electrolytic cells constituting the above mentioned electrode arrangement from a power source 14. At this time, the web 1 performs anode reaction treatment at the part opposed to a graphite electrode 8 but cathode reaction is performed at the surface of the electrode 8. When current values to a graphite electrode 7 and the electrode 20 are respectively set to Ialpha, beta, control is performed so as to be beta>0.
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