Abstract: The present invention relates to the electrodeposition of brass in a form suitable for use as undercoats for subsequently applied metal coatings, and to electrolytes suitable therefor, comprising a soluble manganous compound and preferably an agent which prevents precipitation of manganese from said electrolyte.

Abstract: The present invention relates to the electrodeposition of brass in a form suitable for use as undercoats for subsequently applied metal coatings, and to electrolytes suitable therefor, comprising a conventional cyanide brass elctrolyte containing a soluble manganous compound and a soluble nickel compound and preferably a chelating or sequestering agent.

Abstract: The present invention relates to additives for electroplating baths used for the electrodeposition of zinc-copper alloys, and particularly to such alloys designed to be used as undercoats for subsequently applied metal coatings. The improvement comprises additives for incorporation into conventional zinc-copper electrolytes, comprising a mixture of a buffering agent selected from the group consisting of boric acid, alkali metal borates, alkali metal carbonates, alkali metal phosphates and glycine, a metal ion selected from the group consisting of nickel ion and cobalt ion, and ethylenediaminetetra acetic acid (as the alkali metal salt).