EP 3390690 A1 20181024 - METHOD FOR PASSIVATING A SURFACE OF A METAL PART
Title (en)
METHOD FOR PASSIVATING A SURFACE OF A METAL PART
Title (de)
VERFAHREN ZUR PASSIVIERUNG EINER OBERFLÄCHE EINES METALLBAUTEILS
Title (fr)
PROCÉDÉ DE PASSIVATION D'UNE SURFACE D'UN ÉLÉMENT MÉTALLIQUE
Publication
Application
Priority
- DE 102016002852 A 20160310
- EP 2017000240 W 20170220
Abstract (en)
[origin: WO2017153036A1] The invention relates to a method for passivating a surface (25) of a metal part (3), wherein a calcium phosphate-containing conversion coating (5) that comprises oxides and hydroxides as well as carbonates of the material from the metal part, is created on the surface (25) in a passivation step using an aqueous passivation solution. According to the invention, the passivation solution for forming the conversion coating (5) includes at least one substance that acts as a chelating agent.
IPC 8 full level
C23C 22/22 (2006.01); C23C 22/68 (2006.01); C25D 13/20 (2006.01)
CPC (source: EP)
C23C 22/22 (2013.01); C23C 22/68 (2013.01)
Citation (search report)
See references of WO 2017153036A1
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)
WO 2017153036 A1 20170914; DE 102016002852 A1 20170914; EP 3390690 A1 20181024; EP 3390690 B1 20220427; EP 3390690 B8 20220629
DOCDB simple family (application)
EP 2017000240 W 20170220; DE 102016002852 A 20160310; EP 17710122 A 20170220