Additive agent for zinc alloy electrolyte and process
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United States of America Patent
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Jul 1, 1986
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N/A
app pub date -
Aug 29, 1985
filing date -
Aug 29, 1985
priority date (Note) -
Expired
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Abstract
An improved aqueous acidic electrolyte suitable for electrodepositing zinc alloys comprising a combination of zinc and at least one metal selected from the group consisting of nickel, cobalt, iron, and mixtures thereof incorporating an effective amount of an additive agent for providing improved grain-refinement and enhancing the codeposition of the alloying metals in the zinc alloy deposit. The additive agent comprises a bath soluble anionic carboxylated polyoxyalkylene compound derived from the carboxylation of: (a) the polymerization of alkylene oxides selected from the group consisting of ethylene oxide, propylene oxide, glycidol, butylene oxide and mixtures thereof; and (b) the alkoxylation of mono and polyhydroxy compounds selected from the group consisting of hydroxyl containing alkyl, alkenyl, alkynyl, aryl, as well as mixtures thereof. The present invention further encompasses the process of employing the aforementioned electrolyte for the deposition of functional and decorative zinc-alloy electrodeposits.
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