EP 1207220 A1 20020522 - Method for surface treatment of aluminum or aluminum alloy
Title (en)
Method for surface treatment of aluminum or aluminum alloy
Title (de)
Verfahren zur Oberflächenbehandlung von Aluminium und Aluminiumlegierung
Title (fr)
Methode pour le traitement de surface d'aluminium et d'alliage d'aluminium
Publication
Application
Priority
JP 2000325941 A 20001025
Abstract (en)
This method employs the electrolyte which consists mainly of a sulfuric acid bath, an oxalic acid bath, or their mixture bath added with either a metal nitrate selected from silver nitrate, copper nitrate, and their combination or a metal sulfate selected from silver sulfate, copper sulfate, and their combination and allows the base material immersed in the electrolyte to be fed with an AC/DC combined current, a negative PR waveform current, or a negative pulse waveform current so as to develop an anodized layer on the surface of the base material and simultaneously deposit in the anodized layer a metal separated from either the metal nitrate or the metal sulfate. Accordingly, both the development of the anodized layer and the deposition of metal can be implemented by a single action of the electrolytic process. <IMAGE>
IPC 1-7
IPC 8 full level
C25D 11/04 (2006.01); C25D 11/06 (2006.01); C25D 11/22 (2006.01); C25D 11/08 (2006.01); C25D 11/14 (2006.01); C25D 11/16 (2006.01)
CPC (source: EP)
C25D 11/024 (2013.01); C25D 11/04 (2013.01); C25D 11/06 (2013.01); C25D 11/22 (2013.01)
Citation (search report)
- [XY] US 4209569 A 19800624 - BRUGGER ROBERT [DE]
- [X] US 4115211 A 19780919 - TSUKAMOTO TAKEO, et al
- [X] US 3929593 A 19751230 - SUGIYAMA NOBORU, et al
- [XY] US 5132003 A 19920721 - MITANI MINORU [JP]
- [A] US 4356066 A 19821026 - KIENLE HELMUT, et al
- [A] US 4230758 A 19801028 - NAGAI SHUZO, et al
- [A] PATENT ABSTRACTS OF JAPAN vol. 1998, no. 09 31 July 1998 (1998-07-31)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 1207220 A1 20020522; EP 1207220 B1 20080116; CN 1181228 C 20041222; CN 1351196 A 20020529; DE 60132422 D1 20080306
DOCDB simple family (application)
EP 01125530 A 20011025; CN 01137508 A 20011025; DE 60132422 T 20011025