Title:
PRETREATMENT PROCESS FOR COATING OF ALUMINIUM MATERIALS
Document Type and Number:
WIPO Patent Application WO2003048427
Kind Code:
A3
Abstract:
The invention relates to a method for applying electro-deposited metal coatings (3) upon aluminium or aluminium alloy components (1). According to said method, the surface (4) of the component is cleaned in an appropriate solution, in particular a solution of oils, fats, emulsions, pigments, etc. Said surface (4) is then etched in an appropriate solution, such that a certain quantity of material or near-surface alloy constituents is dissolved. After cleaning and dissolution, water rinsing is carried out. Immediately after the dissolution of the near-surface regions, the surface (4) of said component (1) is activated in a solution, containing iron ions, with a sulphate base by the anodic coupling of said component (1). The functional layer (3) is then applied by the cathodic coupling of said component (1), without intermediate rinsing, in the same electrolyte or in a similar or equivalent electrolyte, said functional layer (3) being made of iron (5).
Inventors:
LINDE RUDOLF (DE)
STUCKERT WOLFGANG (DE)
STUCKERT WOLFGANG (DE)
Application Number:
PCT/EP2002/012437
Publication Date:
December 24, 2003
Filing Date:
November 07, 2002
Export Citation:
Assignee:
FEDERAL MOGUL BURSCHEID GMBH (DE)
LINDE RUDOLF (DE)
STUCKERT WOLFGANG (DE)
LINDE RUDOLF (DE)
STUCKERT WOLFGANG (DE)
International Classes:
C25D5/10; C25D5/30; C25D5/44; C25D7/00; C25D3/20; C25D13/10; F02F3/10; (IPC1-7): C25D5/44; C25D7/00; F02F1/00; F02F3/10
Domestic Patent References:
| WO1999045178A1 | 1999-09-10 |
Foreign References:
| US5516419A | 1996-05-14 | |||
| US6258415B1 | 2001-07-10 |
Other References:
DATABASE WPI Section Ch Week 198027, Derwent World Patents Index; Class M11, AN 1980-47588C, XP002237630
DATABASE WPI Section Ch Week 198541, Derwent World Patents Index; Class A82, AN 1985-252086, XP002237631
DATABASE WPI Section Ch Week 197651, Derwent World Patents Index; Class M13, AN 1976-95305X, XP002237632
DATABASE WPI Section Ch Week 198541, Derwent World Patents Index; Class A82, AN 1985-252086, XP002237631
DATABASE WPI Section Ch Week 197651, Derwent World Patents Index; Class M13, AN 1976-95305X, XP002237632
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