EP 3129525 A2 20170215 - METHOD FOR ACTIVATING METALLIC SURFACES TO BE PHOSPHATED, PREFERABLY GALVANIZED STEEL SHEET
Title (en)
METHOD FOR ACTIVATING METALLIC SURFACES TO BE PHOSPHATED, PREFERABLY GALVANIZED STEEL SHEET
Title (de)
VERFAHREN ZUR AKTIVIERUNG VON ZU PHOSPHATIERENDEN METALLOBERFLÄCHEN, VORZUGSWEISE VERZINKTEM STAHLBLECH
Title (fr)
PROCÉDÉ D'ACTIVATION DE SURFACES MÉTALLIQUES À PHOSPHATER, DE PRÉFÉRENCE DE TÔLE D'ACIER GALVANISÉE
Publication
Application
Priority
- DE 102014105226 A 20140411
- EP 2015057464 W 20150407
Abstract (en)
[origin: WO2015155163A2] The invention relates to a method for activating metal surfaces, in particular coated steel plate, preferably galvanized steel plate before a phosphating process, wherein the in particular coated, preferably electrolytically galvanized metal plate (2') is brought into contact with an activation bath (6) which contains activation particles dispersed in water, preferably based on phosphate and/or titanium. In order to reduce or even to resolve the problem of poor paint adhesion to preferably electrolytically galvanized, phosphated strip metal, according to the invention, at least one additive (A), which suppresses or at least slows an agglomeration of the activation particles, is supplied to the activation bath (6). Polyethylene glycol (PEG) and/or sodium stearate is preferably added as additive (A). In a particularly preferred embodiment of the method according to the invention, the particle size distribution of the activation particles in the activation bath (6) is identified and the activation bath (6) is renewed or removed from operation in dependence on the particle size distribution of the activation particles.
IPC 8 full level
C23C 18/30 (2006.01)
CPC (source: CN EP KR US)
C23C 18/1834 (2013.01 - CN); C23C 18/30 (2013.01 - EP KR US); C23C 22/07 (2013.01 - EP US); C23C 22/78 (2013.01 - EP US); C23C 22/80 (2013.01 - EP US); C23F 17/00 (2013.01 - US); C25D 3/22 (2013.01 - US); C25D 5/48 (2013.01 - KR)
Citation (search report)
See references of WO 2015155163A2
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 102014105226 A1 20151015; CN 106471157 A 20170301; CN 106471157 B 20190830; EP 3129525 A2 20170215; EP 3129525 B1 20190220; JP 2017510709 A 20170413; JP 6626000 B2 20191225; KR 20160145080 A 20161219; US 10480080 B2 20191119; US 2017029954 A1 20170202; WO 2015155163 A2 20151015; WO 2015155163 A3 20151217
DOCDB simple family (application)
DE 102014105226 A 20140411; CN 201580019197 A 20150407; EP 15741927 A 20150407; EP 2015057464 W 20150407; JP 2016560692 A 20150407; KR 20167031249 A 20150407; US 201515302365 A 20150407