EP 3455392 A1 20190320 - CONVERSION COATINGS FOR METAL SURFACES
Title (en)
CONVERSION COATINGS FOR METAL SURFACES
Title (de)
KONVERSIONSSCHICHTEN FÜR METALLISCHE OBERFLÄCHEN
Title (fr)
COUCHES DE CONVERSION POUR SURFACES MÉTALLIQUES
Publication
Application
Priority
- DE 102016005656 A 20160511
- EP 2017000560 W 20170505
Abstract (en)
[origin: WO2017194187A1] The invention relates to an aqueous treatment solution for producing conversion coatings on metal surfaces, particularly on zinc or zinc alloy surfaces, said solution containing: Cr(III) ions at an amount of 0.1 g/l to 8.0 g/l, zirconium and/or titanium ions at an amount of 0.1 g/l to 15 g/l, organosilane-modified silicon oxide nanoparticles at an amount of between 0.1 g/l to 50 g/l, and fluoride at an amount of 0.1 g/l to 10 g/l. The claimed treatment solution allows metal materials to obtain a high level of corrosion protection, with the decorative and functional properties of the surfaces simultaneously being achieved or improved. It is also possible to avoid known problems when using heavy metal ions, particularly cobalt and chromium(VI) ions.
IPC 8 full level
C23C 22/34 (2006.01); C23C 22/72 (2006.01)
CPC (source: EP US)
C23C 22/34 (2013.01 - EP US); C23C 2222/10 (2013.01 - EP US); C23C 2222/20 (2013.01 - EP US)
Citation (search report)
See references of WO 2017194187A1
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 2017194187 A1 20171116; CN 109312467 A 20190205; DE 102016005656 A1 20171116; EP 3455392 A1 20190320; JP 2019515143 A 20190606; JP 6882340 B2 20210602; US 2019145009 A1 20190516
DOCDB simple family (application)
EP 2017000560 W 20170505; CN 201780028103 A 20170505; DE 102016005656 A 20160511; EP 17737207 A 20170505; JP 2018559818 A 20170505; US 201716300069 A 20170505