INSOLUBLE ANODE

• Main Authors: SHIMIZU HIROKATSU, SODA KOICHI, KASUYA AKIHIRO, YAMAUCHI SHINJI, KITAIKE HIROYUKI, OTOGAWA RYUICHI
• Format: Patent
• Language: English
• Published: 27.10.1998
• Edition: 6
• Subjects: APPARATUS THEREFOR; CHEMISTRY; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS; METALLURGY; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS

PROBLEM TO BE SOLVED: To lessen the consumption of two sheets of insoluble anodes and to prolong the service life of these anodes by changing the amt. of the electrode active substances according to the potential difference to be impressed on the electrodes at the time of applying the electroplating on both surfaces of a steel sheet in different amts. by using two sheets of the insoluble anodes. SOLUTION: At the time of allowing the steel sheet to travel between two sheets of the insoluble anodes in the plating liquid and applying the electroplating of the different amts. on both surfaces thereof, the width of the insoluble anodes is set larger than the width of the steel sheet to be plated and both surfaces of the steel sheet are plated by giving a difference in the potential of the anodes by a difference in the plating amts. The insoluble anodes are formed by coating the surfaces of titanium substrates with iridium oxide or a compound oxide of iridium-tantalum, iridium- titanium, etc., as the electrode active substances. The coating material, of the electrode active substance on the anode surface where cathode polarization is induced by the difference in the potential between the two anodes is set at 60 g/m and the coating amt. of the electrode active substance of the anode where the cathode polarization does not arise is set at 15 to 60 g/m . As a result, the consumption of the electrode active substance by the cathode polarization of the anodes is decreased.