(19)

(11)

EP 1 228 263 A1

(12)

(43) Date of publication: 07.08.2002 Bulletin 2002/32 (21) Application number: 99964956.9 (22) Date of filing: 03.11.1999

(51) International Patent Classification (IPC)7: C23C 22/86, C23C 22/56, B05D 3/10 (86) International application number: PCT/US9925/894 (87) International publication number: WO 0132/955 (10.05.2001 Gazette 2001/19)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (71) Applicant: Alcoa Inc. Pittsburgh, PA 15212-5858 (US)	(72) Inventors: Guthrie, Joseph D.,Alcoa Technical Center Alcoa Center, PA 15069-0001 (US) Dennis, Alfred M. Newburgh, IN 47629-0010 (US) (74) Representative: Ebner von Eschenbach, Jennifer et al Ladas & Parry,Dachauerstrasse 37 80335 München 80335 München (DE)