Bath composition and method of electrodepositing utilizing the same
AssigneeOxy Metal Industries Corporation
InventorsSylvia Martin, Hans Gerhard Creutz, Donald Harvey Becking
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Abstract
The instant invention is broadly directed to acid zinc electroplating baths and the use thereof wherein there is utilized water soluble polyglycidols and their derivatives which have been found useful in relatively small additive amounts to the plating solutions and accomplish marked improvements in the brightness of the cathode deposits and also increase the throwing power of the plating solutions.
Claims7
A composition for the electrodeposition of zinc upon a substrate, which comprises an aqueous acidic solution containing a soluble zinc salt in which the zinc concentration is present in an amount of about 20 to 200 grams per liter, and a polymeric additive selected from the group consisting of polyglycidol and copolymers of polyglycidol with an alkylene oxide or their ready polymers and epichlorohydrin.
A method for electrodepositing zinc to provide enhanced throwing power and an improved brightened electrodeposit, which comprises forming an acidic aqueous zinc electroplating bath which includes therein a zinc salt selected from the group consisting of zinc sulfate, zinc fluoborate, zinc chloride, zinc acetate, zinc sulfamate, or zinc gluconate, and dissolving therein a polymeric additive selected from the group consisting of polymerized polyglycidol and copolymers of polyglycidol and alkylene oxides, the ready polymers thereof, and epichlorohydrin.
Dependencies are inferred from the claim text.