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AssigneeJfe Steel Corporation
InventorsGentaro TAKEDA, Hideyuki TAKAHASHI, Maiko WATANABE, Yoichi MAKIMIZU
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A method for circulating an iron-based electroplating solution, a method for manufacturing an iron-based electroplating solution, and a method for manufacturing an alloyed hot-dip galvanized steel sheet, which can be used to obtain an iron-based electroplating solution that is stably capable of operating with high electrolytic efficiency without sludge contamination and is capable of being power-saved without requiring large-scale equipment. In the first method, an iron-based electroplating solution used in an electroplating cell for iron-based electroplating is circulated and adjusted. The iron-based electroplating solution used in the electroplating cell is caused to pass through at least a reduction tank, a vertical centrifugal solid-liquid separation device, and a final adjustment tank in this order, and then is put into the electroplating cell. In the reduction tank, an iron source for reduction according to a concentration of Fe3+ in the iron-based electroplating solution transferred to the reduction tank is put.
A method for circulating an iron-based electroplating solution, in which an iron-based electroplating solution used in an electroplating cell for iron-based electroplating is circulated and adjusted, the method comprising causing the iron-based electroplating solution used in the electroplating cell to pass through at least a reduction tank and a vertical centrifugal solid-liquid separation device in this order to perform a process, then putting the iron-based electroplating solution into the electroplating cell;
Dependencies are inferred from the claim text.