EP 0399172 A3 19910612 - PROCESS FOR OBTAINING COLOURED SURFACES ON PIECES OF ALUMINIUM OR PIECES OF ALUMINIUM ALLOYS

Title (en)

PROCESS FOR OBTAINING COLOURED SURFACES ON PIECES OF ALUMINIUM OR PIECES OF ALUMINIUM ALLOYS

Publication

EP 0399172 A3 19910612 (DE)

Application

EP 90105561 A 19900323

Priority

DE 3917188 A 19890526

Abstract (en)

[origin: EP0399172A2] A description is given of a process for obtaining coloured surfaces on parts made of aluminium or aluminium alloys, which is characterised by the following process steps: 1. the parts are pretreated by degreasing or cleaning, 2. the parts are subjected to an electrolytic anodic/alkaline polish, 3. the parts are anodised electrolytically using direct current, 4. the parts are coloured electrolytically and/or organically, and 5. the oxide layer of the parts is densified.

IPC 1-7

C25D 11/16; C25F 3/20; C25D 11/18

IPC 8 full level

C25D 11/16 (2006.01); C25D 11/18 (2006.01); C25D 11/20 (2006.01); C25F 3/20 (2006.01)

CPC (source: EP US)

C25D 11/16 (2013.01 - EP US); C25D 11/18 (2013.01 - EP US); C25F 3/20 (2013.01 - EP US)

Citation (search report)

[A] GB 1569101 A 19800611 - BRITISH ALUMINIUM CO LTD
[A] US 3390063 A 19680625 - WORKING KENNETH C
[A] US 3365380 A 19680123 - YASUICHI SHIBASAKI
[A] US 2647865 A 19530804 - MANFRED FREUD HERBERT
[A] FR 1003126 A 19520314
[A] GB 606240 A 19480810 - CIE DE PROD CHIM ET ELECTRO ME
[A] DE 3327191 A1 19840209 - SANDOZ AG [DE]
[A] EP 0127774 A2 19841212 - ALVAREZ SANCHIS ELIA MARIA
[X] S. WERNICK et al.: " The surface treatment and finishing of aluminium and its alloys", Auflage 5, Band 1, 1987, Seiten 73,522-543
[A] S. WERNICK et al.: "The surface treatment and finishing of aluminium and its alloys", Auflage 5, 1987, Seiten 169-170,210
[A] PATENT ABSTRACTS OF JAPAN, Band 7, Nr. 273 (C-198)[1418], 6. Dezember 1983; & JP-A-58 153 800 (HONDA GIKEN KOGYO K.K.) 12-09-1983
[A] S. WERNICK et al.: "The surface treatment and finishing of aluminium and its alloys", Auflage 5, Band 1, 1987, Seiten 73-77,409-410,606-608,736

Designated contracting state (EPC)

BE DE ES FR GB IT SE

DOCDB simple family (publication)

EP 0399172 A2 19901128; EP 0399172 A3 19910612; EP 0399172 B1 19930811; DE 3917188 A1 19901129; DE 3917188 C2 19930218; DE 59002262 D1 19930916; JP H0313596 A 19910122; JP H0577755 B2 19931027; US 5102508 A 19920407

DOCDB simple family (application)

EP 90105561 A 19900323; DE 3917188 A 19890526; DE 59002262 T 19900323; JP 13554390 A 19900528; US 52813090 A 19900523