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(11)

EP 3 500 689 A1

(12)

(43) Date of publication: 26.06.2019 Bulletin 2019/26 (21) Application number: 17758674.0 (22) Date of filing: 11.08.2017

(51) International Patent Classification (IPC):  C22F 1/04(2006.01) C22C 21/06(2006.01) C25D 11/14(2006.01) (86) International application number: PCT/US2017/046444 (87) International publication number: WO 2018/034960 (22.02.2018 Gazette 2018/08)

(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 Designated Validation States: MA MD (30) Priority: 17.08.2016 US 201662375932 P (71) Applicant: Novelis, Inc. Atlanta, GA 30326 (US)	(72) Inventors: KANG, DaeHoon Canton Georgia 30115 (US) FRANK, Martin 35327 Ulrichstein-Bobenhausen (DE) BARKER, Simon Woodstock Georgia 30189 (US) MATHUR, Devesh Marietta Georgia 30062 (US) (74) Representative: Weickmann & Weickmann PartmbB  Postfach 860 820 81635 München 81635 München (DE)