(19)

(11)

EP 4 355 643 A1

(12)

(43) Date of publication: 24.04.2024 Bulletin 2024/17 (21) Application number: 22825414.0 (22) Date of filing: 28.04.2022

(51) International Patent Classification (IPC):  B63B 21/20(2006.01) C23F 13/00(2006.01) (52) Cooperative Patent Classification (CPC): B63B 21/20; C23F 13/18; C23F 2213/31 (86) International application number: PCT/NO2022/050096 (87) International publication number: WO 2022/265512 (22.12.2022 Gazette 2022/51)

(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: 17.06.2021 NO 20210786 (71) Applicant: Imenco Corrosion Technology AS 5570 Aksdal (NO)	(72) Inventor: DIGRE, Nils-Olav 4319 Sandnes (NO) (74) Representative: Håmsø Patentbyrå AS  P.O. Box 9 4068 Stavanger 4068 Stavanger (NO)