(19)

(11)

EP 2 238 279 A1

(12)

(43) Date of publication: 13.10.2010 Bulletin 2010/41 (21) Application number: 09701092.0 (22) Date of filing: 09.01.2009

(51) International Patent Classification (IPC):  C23D 3/00(2006.01) (86) International application number: PCT/EP2009/050214 (87) International publication number: WO 2009/087217 (16.07.2009 Gazette 2009/29)

(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 MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 10.01.2008 EP 08150162 (71) Applicant: Arcelormittal Investigación y Desarrollo SL 48910 Sestao, Bizkaia (ES)	(72) Inventors: LEVEAUX, Marc F-59700 Marcq En Baroeul (FR) GONZALEZ, Javier B-9000 Gent (BE) (74) Representative: pronovem  Office Van Malderen Avenue Josse Goffin 158 1082 Bruxelles 1082 Bruxelles (BE)