EP 0786539 A3 19970820 -
Publication
Application
Priority
US 59243996 A 19960126
Abstract (en)
[origin: EP0786539A2] 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 (search report)
- [XD] US 4207150 A 19800610 - CREUTZ HANS G [US], et al
- [X] US 3928149 A 19751223 - STEEG JOACHIM
- [XP] EP 0727512 A1 19960821 - ATOTECH USA INC [US]
- [XP] EP 0730047 A1 19960904 - ATOTECH USA INC [US]
- [A] US 5458764 A 19951017 - URAKAWA TAKAYUKI [JP], et al
- [A] DE 3839823 A1 19890608 - LPW CHEMIE GMBH [DE]
- [X] DATABASE WPI Section Ch Week 9303, Derwent World Patents Index; Class E12, AN 93-025443, XP002032981
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