(19)

(11)

EP 3 921 459 A1

(12)

(43) Date of publication: 15.12.2021 Bulletin 2021/50 (21) Application number: 20701217.0 (22) Date of filing: 27.01.2020

(51) International Patent Classification (IPC):  C25D 3/48(2006.01) C25D 3/62(2006.01) C22C 5/02(2006.01) (52) Cooperative Patent Classification (CPC): C25D 3/62; C22C 5/02 (86) International application number: PCT/EP2020/051892 (87) International publication number: WO 2020/160951 (13.08.2020 Gazette 2020/33)

(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: KH MA MD TN (30) Priority: 07.02.2019 IT 201900001769 (71) Applicant: Italfimet Srl 52048 Monte San Savino (IT)	(72) Inventor: CAPACCIOLI, Patrizio 52020 PERGINE VALDARNO (IT) (74) Representative: Modiano, Micaela Nadia  Modiano & Partners Via Meravigli, 16 20123 Milano 20123 Milano (IT)