METHOD FOR THE GALVANIC DEPOSITION OF A PRECIPITATE IRON AND NICKEL AND / OR COBALT AND HAVING SUITABLE BATH.

摘要

In accordance with certain of its aspects this invention relates to a process and composition for the preparation of an electrodeposit which contains iron; at least one metal selected from the group consisting of nickel and cobalt or; binary or ternary alloys of iron and of the metals selected from nickel and coba which comprises passing current from an anode to a cathode through an aqueous acidic electroplating solution containing iron and at least one member selected from the group consisting of nickel compounds and cobalt compounds providing nickel, cobalt and iron ions for electrodepositing nickel-iron alloys, cobalt-iron alloys or nickel-iron-cobalt alloys, an effective amount of at least one additive; the improvement comprising the presence of at least one complexing compound consisting of a poly-substituted aryl compound containing at least one carboxylic acid group defined as -COOH, another substituent independently selected from hydroxy or carboxy, and one or more substituents independently selected from sulfo, defined -SO3H, or sulfoalkyl groups.