EP 0087288 A1 19830831 - Bath and method for black chromate plating of zinc and cadmium surfaces.
Title (en)
Bath and method for black chromate plating of zinc and cadmium surfaces.
Title (de)
Lösung und Verfahren zum Schwarzchromatisieren von Zink- und Cadmiumoberflächen.
Title (fr)
Bain et procédé pour la chromatisation noire de surfaces de zinc et de cadmium.
Publication
Application
Priority
FR 8202816 A 19820219
Abstract (en)
An aqueous bath for black chromate plating of a surface of zinc, zinc alloy or cadmium alloy containing sulphate ions, 5 to 40 g/l of hexavalent chromium, 0.25 to 30 g/l of copper ions, 0.1 to 5 g/l of silver ions and/or molybdic ions, 30 to 120 g/l of acetic acid and 0 to 6 g/l of formic acid. Such surfaces plated by the method using the said bath produces a shiny black adherent coating giving good protection against corrosion of the substrate.
IPC 1-7
IPC 8 full level
C23C 22/27 (2006.01); C23C 22/30 (2006.01); C23C 22/43 (2006.01); C23C 22/83 (2006.01)
CPC (source: EP)
C23C 22/27 (2013.01); C23C 22/30 (2013.01); C23C 22/43 (2013.01); C23C 22/83 (2013.01)
Citation (search report)
- [Y] DD 136979 A1 19790808 - STRAUCH ALEXANDER, et al
- [Y] GB 618667 A 19490224 - JESSE EDWIN STARECK, et al
- [Y] US 3097978 A 19630716 - NEWELL ISAAC L, et al
- [A] US 2524577 A 19501003 - EDWIN STARECK JESSE
- [X] CHEMICAL ABSTRACTS, vol. 90, no. 18, April, 1979, page 190, no. 140877z, Columbus, Ohio, US; & PL-A-083 483 (INSTYTUT MECHANIKI PRECYZYJNEJ) 30-04-1977
- [Y] PLATING AND SURFACE FINISHING, vol. 68, no. 10, October, 1981, pages 54-56; V.G. ROZOVSKY et al.: "Corrosion resistance of black chromate conversion films on zinc"
Designated contracting state (EPC)
AT BE CH DE GB IT LI NL SE
DOCDB simple family (publication)
EP 0087288 A1 19830831; FR 2522023 A1 19830826; FR 2522023 B1 19870821; JP S58193376 A 19831111; WO 8302961 A1 19830901
DOCDB simple family (application)
EP 83300852 A 19830218; FR 8202816 A 19820219; JP 2052383 A 19830209; US 8300229 W 19830222