EP 0786539 A2 19970730 - High current density zinc organosulfonate electrogalvanizing process and composition
Title (en)
High current density zinc organosulfonate electrogalvanizing process and composition
Title (de)
Elektrogalvanisierungsverfahren mit hoher Stromdichte auf Zinkorganophosphonatbasis sowie die zugehörige Zusammensetzung
Title (fr)
Procédé de galvanisation électrolytique à une haute densité de courant à partir d'un bain à base d'un organophosphonate de zinc et composition du bain
Publication
Application
Priority
US 59243996 A 19960126
Abstract (en)
The inventors disclose a process for reducing high current density edge buildup dendrite formation, edge burn, controlling high current density roughness, grain size, and orientation of a zinc coating obtained from an aqueous zinc acidic electrogalvanic coating bath comprising passing a high density current from a zinc anode in the bath to a metal cathode in the bath for a period of time sufficient to deposit a zinc coating on the cathode. The bath contains greater than about 5g/l of a water soluble zinc organosulfonate. A random or block polyoxyalkylene glycol homopolymer or copolymer based on 2 to about 4 carbon atom alkylene oxides. The inventors employ current densities from about 250 to about 4,000 ASF, and optionally, a sulfonated condensation product of naphthalene and formaldehyde, a boron oxide compound, and a lignin compound. The invention also comprises bath compositions.
IPC 1-7
IPC 8 full level
CPC (source: EP KR)
C25D 3/22 (2013.01 - EP KR); C25D 3/565 (2013.01 - EP KR)
Citation (applicant)
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Designated contracting state (EPC)
BE DE ES FR GB IT
DOCDB simple family (publication)
EP 0786539 A2 19970730; EP 0786539 A3 19970820; JP H09310192 A 19971202; KR 970059314 A 19970812
DOCDB simple family (application)
EP 97100964 A 19970122; JP 2454797 A 19970124; KR 19970002124 A 19970125