| (19) |
 |
|
(11) |
EP 2 055 810 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
23.01.2013 Bulletin 2013/04 |
| (43) |
Date of publication A2: |
|
06.05.2009 Bulletin 2009/19 |
| (22) |
Date of filing: 07.03.2008 |
|
| (51) |
International Patent Classification (IPC):
|
|
| (84) |
Designated Contracting States: |
|
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL
PT RO SE SI SK TR |
|
Designated Extension States: |
|
AL BA MK RS |
| (30) |
Priority: |
29.10.2007 ES 200702842
|
| (71) |
Applicant: Airbus Operations S.L. |
|
28906 Getafe, Madrid (ES) |
|
| (72) |
Inventors: |
|
- Ignacio, García Diego
28670 Villa Viciosa de Odon
Madrid
(ES)
- Maria Ángeles, Lavia González-Escalada
28009 Madrid (ES)
- Manuel, García Rubio
28700 San Sebastián de los Reyes
Madrid (ES)
- Pilar, Ocón Esteban
28670 Tres Cantos
Madrid (ES)
|
| (74) |
Representative: Ungria López, Javier et al |
|
Avda. Ramón y Cajal, 78
28043 Madrid
28043 Madrid (ES) |
|
| |
|
| (54) |
Procedure for anodising aluminium or aluminium alloys |
(57) This invention refers to a procedure for anodising aluminium or aluminium alloys
in which an aluminium or an aluminium alloy part is submerged an in an aqueous solution
at a temperature between 0°C and 140°C, preferably between 0°C and 130°C, in which
said solution includes:
- sulphuric acid,
- tartaric acid, and
- at least one inorganic salt of an element selected between at least one transition
metal, a lanthanide element, an actinide, and combinations of them,
and applying a controlled potential difference, obtaining layers of aluminium oxide
with properties as good as or even better than those obtained through anodising in
traditional chromic acid solutions.