EP 0342585 A1 19891123 - Coated steel sheets and process for producing the same.
Title (en)
Coated steel sheets and process for producing the same.
Title (de)
Beschichtete Stahlbleche und Verfahren zu deren Herstellung.
Title (fr)
TÔles d'acier revêtues et procédé pour les préparer.
Publication
Application
Priority
- JP 11811888 A 19880517
- JP 11811988 A 19880517
- JP 13831988 A 19880607
- JP 19152188 A 19880729
- JP 23226588 A 19880919
- JP 23226688 A 19880919
Abstract (en)
Disclosed are electro-plated steel sheets having a primer coating composed of 5 to 30 % by weight of Cr, 0.005 to 5 % by weight of a cationic polymer, with the balance being Zn, with or without a further Zn or Zn-alloy coating formed on the primer coating. The primer coating may contain fine particles of oxides and/or iron-group metals, and may further be applied with a chromate film and/or an organic coating. Also disclosed is the process for producing an electro-plated steel sheet having excellent corrosion resistance and surface brightness, comprising performing electro-plating in an acidic Zn plating bath containing Cr ions and cation polymer, with the ratio of Cr<6><+> ions/Cr<3><+> ions being not more than 0.1.
IPC 1-7
IPC 8 full level
C25D 3/56 (2006.01); C25D 5/10 (2006.01); C25D 11/38 (2006.01); C25D 15/02 (2006.01)
CPC (source: EP US)
C25D 3/565 (2013.01 - EP); C25D 5/10 (2013.01 - EP US); C25D 5/611 (2020.08 - EP US); C25D 5/627 (2020.08 - EP US); C25D 11/38 (2013.01 - EP); C25D 15/02 (2013.01 - EP US)
Citation (search report)
- [A] FR 2145818 A5 19730223 - NIPPON KOKAN KK
- [AD] EP 0182964 A1 19860604 - KAWASAKI STEEL CO [JP]
- [A] CHEMICAL ABSTRACTS, vol. 101, no. 14, October 1, 1984, Columbus, Ohio, USA, KAWASAKI STEEL CORP. "Steel sheets plated on one side withzinc or zinc alloys." page 524, abstract-no. 119 424k, & Jpn. Kokai Tokkyo Koho JP - A - 59 096 291
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0342585 A1 19891123; EP 0342585 B1 19930818; CA 1337555 C 19951114; DE 68908471 D1 19930923; DE 68908471 T2 19940310
DOCDB simple family (application)
EP 89108750 A 19890516; CA 599581 A 19890512; DE 68908471 T 19890516