US2004104123A1PendingUtilityA1

Alkaline zinc-nickel bath

47
Priority: Jul 30, 1998Filed: Jul 11, 2003Published: Jun 3, 2004
Est. expiryJul 30, 2018(expired)· nominal 20-yr term from priority
Inventors:Ernst-Walter Hillebrand
C25D 21/12C25D 3/565C25D 17/02
47
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Claims

Abstract

The anode is separated from the alkaline electrode to avoid undesirable secondary reactions in an alkali zinc nickel electroplating bath.

Claims

exact text as granted — not AI-modified
1 . Alkaline electroplating bath for plating zinc-nickel coatings, having an anode ( 2 ) and a cathode ( 3 ), characterized in that the anode is separated from the alkaline electrolyte by an ion exchange membrane ( 6 ).  
     
     
         2 . Electroplating bath according to  claim 1 , characterized in that the cathode ( 3 ) is separated from the alkaline electrolyte ( 4 ) by a perfluorinated cation exchange membrane ( 6 ).  
     
     
         3 . Electroplating bath according to  claim 1  or  2 , characterized by sulfuric acid, phosphoric acid, methanesulfonic acid, amidosulfonic acid and/or phosphonic acid as anolyte ( 5 ).  
     
     
         4 . Electroplating bath according to one of  claims 1  to  3 , characterized by a platinum-coated titanium anode.

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