METHOD FOR CONTROLLING METAL ION CONCENTRATION IN ZINC BASED ALLOY ELECTROPLATING SOLUTION

PURPOSE:To precisely control the conc. of metal ion in a electroplating solution without arising continuously dead time at time of zinc based-alloy electroplating a steel strip by the use of an insoluble anode. CONSTITUTION:A quantity of metal salt to be supplied is specified by the sum of a standar...

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Hauptverfasser:	AKIBA MASATOSHI, OHARAGI SHIGEJI, FURUKAWA TAKAHITO
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMISTRY ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
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Beschreibung
Zusammenfassung:	PURPOSE:To precisely control the conc. of metal ion in a electroplating solution without arising continuously dead time at time of zinc based-alloy electroplating a steel strip by the use of an insoluble anode. CONSTITUTION:A quantity of metal salt to be supplied is specified by the sum of a standard supplying quantity of metal salt calculated based on a plating current value and a dragout of the plating solution and a calibrated supplying amount of metal salt calculated based on the metal conc. in the plating solution and pH of the plating solution, and the conc. of metal ion in the plating solution is controlled by replenishing the amount of metal sale specified in this way into the plating solution.