(19)

(11)

EP 2 820 162 A1

(12)

(43) Date of publication: 07.01.2015 Bulletin 2015/02 (21) Application number: 13706177.6 (22) Date of filing: 26.02.2013

(51) International Patent Classification (IPC):  C21D 1/68(2006.01) C21D 8/02(2006.01) C23C 28/00(2006.01) B05D 7/14(2006.01) C23C 22/68(2006.01) C21D 1/70(2006.01) C23C 22/62(2006.01) C21D 1/72(2006.01) C23C 22/50(2006.01) C23C 22/74(2006.01) (86) International application number: PCT/EP2013/000549 (87) International publication number: WO 2013/127515 (06.09.2013 Gazette 2013/36)

(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 Designated Extension States: BA ME (30) Priority: 27.02.2012 EP 12001274 (71) Applicant: Tata Steel Nederland Technology B.V. 1970 CA IJmuiden (NL)	(72) Inventors: HANNOUR, Fouzia NL-1970 CA IJmuiden (NL) FLORES RAMIREZ, Jose Reyes NL-1970 CA IJmuiden (NL) DE OLIVEIRA, Uazir Orion Bezerra NL-1970 CA IJmuiden (NL) (74) Representative: Kruit, Jan  Tata Steel Nederland Technology BV Group Intellectual Property Services - 3G37 P.O. Box 10000 1970 CA Ijmuiden 1970 CA Ijmuiden (NL)