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(11)

EP 2 616 568 A1

(12)

(43) Date of publication: 24.07.2013 Bulletin 2013/30 (21) Application number: 11757856.7 (22) Date of filing: 15.09.2011

(51) International Patent Classification (IPC):  C23F 13/10(2006.01) B21D 31/04(2006.01) (86) International application number: PCT/EP2011/066021 (87) International publication number: WO 2012/035107 (22.03.2012 Gazette 2012/12)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 17.09.2010 IT MI20101689 (71) Applicant: Industrie De Nora S.P.A. 20134 Milano (IT)	(72) Inventors: MOJANA, Corrado I-23868 Valmadrera (IT) TREMOLADA, Simone I-20052 Monza (IT) (74) Representative: Reitstötter - Kinzebach  Patentanwälte Sternwartstrasse 4 81679 München 81679 München (DE)