Method for continuously manganese-electroplating or manganese-al

Details Method for continuously manganese-electroplating or manganese-al Method for continuously manganese-electroplating or manganese-al

1991-08-13

1993-03-30

Tufariello, T. M.

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Coating moving substrate

C25D 706

Patent

active

051980959

ABSTRACT:
A method for continuously manganese-electroplating or manganese-alloy-electroplating a steel sheet, which comprises the steps of: using a manganese electroplating solution or a manganese alloy electroplating solution, using an insoluble anode, and causing a DC electric current to flow between the insoluble anode and a steel sheet during travelling through the electroplating solution while replenishing the manganese electroplating solution or the manganese alloy electroplating solution with manganese ions or manganese alloy ions, thereby forming a manganese plating layer or a manganese alloy plating layer on at least one surface of the steel sheet. As the insoluble anode, a hydrogen gas diffusing insoluble anode is used. By continuously supplying a hydrogen gas to the hydrogen gas diffusing insoluble anode, an oxidation reaction of the hydrogen gas is caused to take place at the hydrogen gas diffusing insoluble anode, thereby preventing the production of multivalent manganese in the solid state or the ionic state and having at least trivalence in the manganese electroplating solution or the manganese alloy electroplating solution.

REFERENCES:
patent: 4269904 (1981-05-01), Ikeno et al.
patent: 4900406 (1990-02-01), Janssen

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