EP 4223906 A1 20230809 - PROCESS SEQUENCE FOR THE PICKLING AND PASSIVATION OF STEEL
Title (en)
PROCESS SEQUENCE FOR THE PICKLING AND PASSIVATION OF STEEL
Title (de)
VERFAHRENSSEQUENZ ZUM BEIZEN UND PASSIVIEREN VON STAHL
Title (fr)
SÉQUENCE DE PROCÉDÉ POUR LE DÉROCHAGE ET LA PASSIVATION D'ACIER
Publication
Application
Priority
EP 22154842 A 20220202
Abstract (en)
The present invention relates to a method for the wet-chemical pretreatment of a plurality of iron components in series encompassing a pickling step and a subsequent conversion coating each based on aqueous sulfuric acid bath solutions wherein the conversion coating bath comprises water-soluble compounds of the elements Zr and/or Ti as well as at least one water-soluble compound of the element Mo.
IPC 8 full level
C23C 22/06 (2006.01); C23C 22/34 (2006.01); C23C 22/36 (2006.01); C23C 22/40 (2006.01); C23C 22/44 (2006.01); C23C 22/78 (2006.01); C23G 1/08 (2006.01); C23G 3/02 (2006.01)
CPC (source: EP)
C23C 22/06 (2013.01); C23C 22/34 (2013.01); C23C 22/44 (2013.01); C23C 22/78 (2013.01); C23G 1/081 (2013.01); C23G 3/021 (2013.01)
Citation (search report)
- [Y] WO 2016091703 A1 20160616 - HENKEL AG & CO KGAA [DE]
- [Y] US 2015225855 A1 20150813 - SUDOUR MICHEL [FR], et al
- [Y] US 2019249030 A1 20190815 - BIRKENHEUER STEFAN [DE], et al
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)
DOCDB simple family (application)
EP 22154842 A 20220202