| (19) |
 |
|
(11) |
EP 1 233 084 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
31.03.2004 Bulletin 2004/14 |
| (43) |
Date of publication A2: |
|
21.08.2002 Bulletin 2002/34 |
| (22) |
Date of filing: 15.02.2002 |
|
| (51) |
International Patent Classification (IPC)7: C25D 11/06 |
|
| (84) |
Designated Contracting States: |
|
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
Designated Extension States: |
|
AL LT LV MK RO SI |
| (30) |
Priority: |
20.02.2001 IT TO010149
|
| (71) |
Applicant: Alenia Aeronautica S.p.A. |
|
80038 Pomigliano D'Arco (Napoli) (IT) |
|
| (72) |
Inventors: |
|
- Dattilo, Alessandro
81055 Santa Maria Capua Vetere (Caserta) (IT)
- Tamiro, Salvatore
10059 Mompantero (Torino) (IT)
- Romano, Carlo
80038 Pomigliano D'Arco (Napoli) (IT)
|
| (74) |
Representative: Gerbino, Angelo et al |
|
Jacobacci & Partners S.p.A. Corso Regio Parco, 27
10152 Torino
10152 Torino (IT) |
|
| |
|
| (54) |
"Anodizing process, with low environmental impact, for a workpiece of aluminium or
aluminium alloys" |
(57) The process for anodizing a workpiece of aluminium or aluminium alloys provides for
the use of the workpiece as the anode of an electrolytic cell in the presence of an
aqueous acid solution which contains from 10 to 200 g sulphuric acid and from 5 to
200 g L(+)-tartaric acid.