Importance

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Abstract

Method and device for pickling, and possibly for degreasing, of elongate metal items, in particular wires, strips and steel section. These items are placed in an electrolyte solution through which an electric current is passed by means of electrodes, said items being moved preferably in a substantially continuous manner lengthwise through at least two successive separate baths of an aqueous hydrochloric acid solution and/or a chlorine mineral salt solution. At least one electrode is placed in each bath and an electric voltage is applied to these electrodes so that the sign of the voltage on the electrode of one of the baths is always different from the sign of the voltage on the electrode of the adjacent bath, the baths being substantially insulated from each other so that the electric current flows between two adjacent baths mainly via that part of the item being moved between said two adjacent baths.

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First Claim