EP 4107297 A1 20221228 - METHOD FOR PRODUCING A SURFACE-FINISHED STEEL SHEET, AND SURFACE-FINISHED STEEL SHEET
Title (en)
METHOD FOR PRODUCING A SURFACE-FINISHED STEEL SHEET, AND SURFACE-FINISHED STEEL SHEET
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES OBERFLÄCHENVEREDELTEN STAHLBLECHS UND OBERFLÄCHENVEREDELTES STAHLBLECH
Title (fr)
PROCÉDÉ DE FABRICATION D'UNE TÔLE D'ACIER TRAITÉE EN SURFACE, ET TÔLE D'ACIER TRAITÉE EN SURFACE
Publication
Application
Priority
- DE 102020202171 A 20200220
- EP 2021053004 W 20210209
Abstract (en)
[origin: WO2021165088A1] The invention relates to a method for improving the wettability of a surface-finished steel sheet (10), in which a protective coating (2) based on Zn-Al-Mg is applied, wherein a native oxide layer comprising at least ZnO, Al2O3 and MgO is formed after the application of the protective coating (2) and the steel sheet comprising the native oxide layer is subjected to at least one further treatment, to modify the native oxide layer, wherein the at least one further treatment comprises at least one heat treatment at a temperature for a period in a non-reducing atmosphere, wherein the non-reducing atmosphere, the temperature and the duration of the heat treatment are harmonized with one another in such a manner that the native oxide layer post-oxidizes, wherein in particular the resulting post-oxidized oxide layer (3) arising is greater than the native oxide layer.
IPC 8 full level
C21D 9/52 (2006.01); C22C 18/04 (2006.01); C23C 2/06 (2006.01); C23C 2/12 (2006.01); C23C 2/28 (2006.01); C23C 2/40 (2006.01)
CPC (source: EP US)
C21D 9/52 (2013.01 - EP); C22C 18/04 (2013.01 - EP); C23C 2/06 (2013.01 - EP); C23C 2/12 (2013.01 - EP); C23C 2/261 (2022.08 - EP US); C23C 2/28 (2013.01 - EP US); C23C 2/40 (2013.01 - EP)
Citation (search report)
See references of WO 2021165088A1
Designated contracting state (EPC)
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 state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DE 102020202171 A1 20210826; EP 4107297 A1 20221228; WO 2021165088 A1 20210826
DOCDB simple family (application)
DE 102020202171 A 20200220; EP 2021053004 W 20210209; EP 21705120 A 20210209