EP 3230491 A1 20171018 - INTEGRATION OF LIGHT METALS INTO STEEL PICKLING AND PRETREATING PROCESSES
Title (en)
INTEGRATION OF LIGHT METALS INTO STEEL PICKLING AND PRETREATING PROCESSES
Title (de)
AUFNAHME VON LEICHTMETALLEN IN BEIZ- UND VORBEHANDLUNGSVERFAHREN FÜR STAHL
Title (fr)
RÉCEPTION DE MÉTAUX LÉGERS DANS UN PROCÉDÉ DE PRÉTRAITEMENT ET DE DÉCAPAGE DE L'ACIER
Publication
Application
Priority
- DE 102014225237 A 20141209
- EP 2015078466 W 20151203
Abstract (en)
[origin: WO2016091703A1] The present invention concerns a method for wet-chemically pretreating a multiplicity of iron components and a multiplicity of aluminium components in series, with each of the iron components undergoing in immediate succession first a pickle (1) and then a reactive rinse (2), and with each of the aluminium components likewise undergoing this same reactive rinse (2), but without having undergone a pickle (1), the pickle (1) being effected by contacting the components with an aqueous bath solution (A) which is acidified with sulphuric acid and has a pH of below 1.0, and the reactive rinse (2) being effected by contacting the components with an aqueous bath solution (B) which is acidified with sulphuric acid and contains a total of at least 0.02 g/kg of water-soluble compounds of the elements Zr and/or Ti, based in each case on the respective elements, and has a pH of not below 1.0.
IPC 8 full level
C23C 22/78 (2006.01); C23C 22/34 (2006.01); C23C 22/73 (2006.01); C23G 1/08 (2006.01)
CPC (source: EP)
C23C 22/34 (2013.01); C23C 22/73 (2013.01); C23C 22/78 (2013.01); C23G 1/081 (2013.01)
Citation (search report)
See references of WO 2016091703A1
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
DOCDB simple family (publication)
DE 102014225237 B3 20160428; EP 3230491 A1 20171018; EP 3230491 B1 20190220; ES 2718759 T3 20190704; WO 2016091703 A1 20160616
DOCDB simple family (application)
DE 102014225237 A 20141209; EP 15804762 A 20151203; EP 2015078466 W 20151203; ES 15804762 T 20151203