(19)

(11)

EP 2 938 748 A2

(12)

(88) Date of publication A3: 19.02.2015 (43) Date of publication: 04.11.2015 Bulletin 2015/45 (21) Application number: 13861504.2 (22) Date of filing: 20.12.2013

(51) International Patent Classification (IPC):  C21D 1/72(2006.01) C25D 5/48(2006.01) C25D 5/36(2006.01) C25D 7/00(2006.01) (86) International application number: PCT/IB2013/002950 (87) International publication number: WO 2014/108727 (17.07.2014 Gazette 2014/29)

(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: 31.12.2012 TR 201215689 (71) Applicant: Robert Bosch GmbH 70442 Stuttgart (DE)	(72) Inventors: OEZEL, Ebru Bursa (TR) MARTIN, Azra Bursa (TR) VAROL OEZGUER, Zuehre Bursa (TR)