EP 0212668 A1 19870304 - Process for the uniform electrolytic colouring of anodized aluminium or aluminium alloys.
Title (en)
Process for the uniform electrolytic colouring of anodized aluminium or aluminium alloys.
Title (de)
Verfahren zur gleichmässigen elektrolytischen Einfärbung von eloxiertem Aluminium bzw. Aluminiumlegierungen.
Title (fr)
Procédé pour la coloration électrolytique uniforme d'aluminium anodisé respectivement d'alliages d'aluminium.
Publication
Application
Priority
DE 3530934 A 19850829
Abstract (en)
[origin: US4737245A] A method for electrolytically coloring anodized aluminum and aluminum alloys in a reproducible manner so that they are of uniform color is provided. The anodized aluminum or aluminum alloy is anodically treated and then electrolytically colored in a solution capable of forming a barrier layer. Prior to the anodic treatment, the counterelectrodes are activated using a direct voltage of 2 to 9 volts between the counterelectrodes, as anodes, and auxiliary electrodes, as cathodes. The process includes the additional step, after anodic treatment and prior to coloring, of maintaining the aluminum or aluminum alloy for a currentless waiting time of from 0.5 to 5 minutes in the treatment solution.
Abstract (de)
Es wird ein Verfahren zur farbgleichen reproduzierbaren elektrolytischen Einfärbung von Aluminium und Aluminiumlegierungen beschrieben, bei dem die Sperrschicht des einzufärbenden Oxids durch anodische Anwendung eines Sperrschichtbildners derart verändert wird, daß eine gleichmäßige elektrolytische Einfärbung möglich ist.
IPC 1-7
IPC 8 full level
C25D 11/12 (2006.01); C25D 11/22 (2006.01)
CPC (source: EP US)
C25D 11/12 (2013.01 - EP US); C25D 11/22 (2013.01 - EP US)
Citation (search report)
- US 4526671 A 19850702 - WATANABE HIROSHI [JP], et al
- CH 584767 A5 19770215 - HENKEL & CIE GMBH
- CH 646463 A5 19841130 - EMPRESA NACIONAL ALUMINIO [ES]
- EP 0097759 A1 19840111 - IBM [US]
- US 4066516 A 19780103 - SATO TOSHIHIKO
Designated contracting state (EPC)
AT CH DE FR GB IT LI SE
DOCDB simple family (publication)
EP 0212668 A1 19870304; DE 3530934 C1 19870416; US 4737245 A 19880412
DOCDB simple family (application)
EP 86111887 A 19860827; DE 3530934 A 19850829; US 90083486 A 19860827