(19)

(11)

EP 1 954 848 A2

(12)

(88) Date of publication A3: 11.10.2007 (43) Date of publication: 13.08.2008 Bulletin 2008/33 (21) Application number: 06793677.3 (22) Date of filing: 20.09.2006

(51) International Patent Classification (IPC):  C23C 8/00(2006.01) C21D 9/00(2006.01) C21D 1/00(2006.01) (86) International application number: PCT/EP2006/066548 (87) International publication number: WO 2007/039468 (12.04.2007 Gazette 2007/15)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 27.09.2005 BR PI0504417 (71) Applicant: ROBERT BOSCH GMBH 70442 Stuttgart (DE)	(72) Inventors: LIPPMANN, Nils 82410-530 Curitiba- Parana (BR) PITELLA, Rogerio 81670-110 Curitiba-boqueirao-parana (BR)