EP 1207221 A4 20020911 - METHOD FOR ELECTROLYTIC COLORING OF ALUMINUM MATERIAL
Title (en)
METHOD FOR ELECTROLYTIC COLORING OF ALUMINUM MATERIAL
Title (de)
VERFAHREN ZUR ELEKTROLYTISCHEN BESCHICHTUNG VON ALUMINIUMMATERIAL
Title (fr)
PROCEDE DE COLORATION ELECTROLYTIQUE D'UN MATERIAU EN ALUMINIUM
Publication
Application
Priority
- JP 0004179 W 20000626
- JP 17956399 A 19990625
- JP 17956499 A 19990625
Abstract (en)
[origin: EP1207221A1] This invention relates to an improvement of a process for electrolytically coloring an aluminum material comprising immersing an aluminum material consisting of anodized aluminum or an anodized aluminum alloy in an electrolytic coloring bath containing a soluble metal salt, performing a pretreatment prior to coloring by passing a direct current waveform with said aluminum material serving as the anode, and performing alternating current electrolytic coloring in the same electrolytic coloring bath and the improved process comprises performing said pretreatment prior to coloring until the voltage and current respectively reach the preset ultimate values. It is possible to prevent as much as possible an occurrence of irregular coloring not only in one energizing lot but also in different energizing lots and produce an aluminum material colored in a uniform tone stably and readily on a commercial scale. <IMAGE>
IPC 1-7
IPC 8 full level
C25D 11/22 (2006.01)
CPC (source: EP KR)
C25D 11/22 (2013.01 - EP KR)
Citation (search report)
- [X] DE 3741456 A1 19890622 - ERBSLOEH JULIUS & AUGUST [DE]
- [X] EP 0413589 A1 19910220 - GARRIGA ELISEO BENITEZ [MX]
- [X] DE 4034854 A1 19910516 - SANDOZ AG [DE]
- [A] US 5674371 A 19971007 - PATEL PINAKIN [US]
- [A] US 4042468 A 19770816 - HASEGAWA MUTSUO, et al
- [A] GB 1022927 A 19660316 - TAHEI ASADA
- [A] PATENT ABSTRACTS OF JAPAN vol. 007, no. 100 (C - 164) 28 April 1983 (1983-04-28)
- [A] PATENT ABSTRACTS OF JAPAN vol. 009, no. 028 (C - 264) 6 February 1985 (1985-02-06)
- See references of WO 0100904A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 1207221 A1 20020522; EP 1207221 A4 20020911; AU 5430200 A 20010131; CA 2377953 A1 20010104; CN 1200146 C 20050504; CN 1358239 A 20020710; KR 100718427 B1 20070514; KR 20020029870 A 20020420; NO 20016306 D0 20011221; NO 20016306 L 20020215; WO 0100904 A1 20010104
DOCDB simple family (application)
EP 00939163 A 20000626; AU 5430200 A 20000626; CA 2377953 A 20000626; CN 00809454 A 20000626; JP 0004179 W 20000626; KR 20017016461 A 20011221; NO 20016306 A 20011221