Importance

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Abstract

Iron foil is made by deposition of iron in an electrochemical cell having an insoluble anode from an acid electrolyte onto a moving cathode by the reaction: Fe.sup.2+ +2e.sup.- .fwdarw.Fe (foil) (I), and removing the iron foil so made from the cathode. In a regenerator iron is dissolved into the electrolyte. To avoid reduction of the foil by Fe.sup.3+ in the electrolyte, hydrogen in the form of hydrogen gas or a gas containing hydrogen is supplied to the anode, the anode being such that the anode reaction: H.sub.2 .fwdarw.2H.sup.+ +2e.sup.- (II) takes place, said reaction (II) predominating at the anode over the reaction: 2Fe.sup.2+ .fwdarw.2Fe.sup.3+ +2e.sup.- (IV). The dissolution of iron in the regenerator takes place at least partly by the reaction: Fe+2H.sup.+ .fwdarw.Fe.sup.2+ +H.sub.2 (III).

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First Claim