EP 2588646 A1 20130508 - METHOD FOR SELECTIVELY PHOSPHATING A COMPOSITE METAL CONSTRUCTION
Title (en)
METHOD FOR SELECTIVELY PHOSPHATING A COMPOSITE METAL CONSTRUCTION
Title (de)
VERFAHREN ZUR SELEKTIVEN PHOSPHATIERUNG EINER VERBUNDMETALLKONSTRUKTION
Title (fr)
PROCÉDÉ DE PHOSPHATATION SÉLECTIVE D'UNE CONSTRUCTION MÉTALLIQUE COMPOSITE
Publication
Application
Priority
- DE 102010030697 A 20100630
- EP 2011060590 W 20110624
Abstract (en)
[origin: CA2802035A1] The invention relates to a multistage method for treating composite metal constructions for corrosion protection, comprising metal surfaces of aluminum, zinc, and optionally iron, wherein, in the first step, the selective zinc phosphating of the zinc and iron surfaces is carried out using a phosphating solution, comprising water-soluble inorganic compounds of silicon in a quantity sufficient for suppressing pinholing on the zinc surfaces, but not exceeding a quantity at which the zinc phosphating loses selectivity. In the subsequent second step of the method according to the invention, the aluminum surfaces are passivated by means of an acid treatment solution. The invention further relates to a zinc phosphating solution suitable for use in the method according to the invention comprising at least 0.025 g/l, but less than 1 g/l of silicon in the form of water-soluble inorganic compounds calculated as SiF6, wherein the product (Si/mM)-(F/mM) of the concentration of silicon (Si in mM) in the form of water-soluble inorganic compounds and the concentration of free fluoride (F in mM) divided by the number of points of free acids is no greater than 5.
IPC 8 full level
C23C 22/00 (2006.01); C23C 22/36 (2006.01); C23C 22/73 (2006.01); C23C 22/83 (2006.01)
CPC (source: EP US)
B05D 3/107 (2013.01 - US); B05D 7/14 (2013.01 - US); C23C 22/362 (2013.01 - EP US); C23C 22/365 (2013.01 - EP US); C23C 22/73 (2013.01 - EP US); C23C 22/83 (2013.01 - EP US)
Citation (search report)
See references of WO 2012000894A1
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
DOCDB simple family (publication)
DE 102010030697 A1 20120105; BR 112012033494 A2 20161129; CA 2802035 A1 20120105; CA 2802035 C 20181218; CN 102959127 A 20130306; CN 102959127 B 20160629; EP 2588646 A1 20130508; EP 2588646 B1 20150923; ES 2556138 T3 20160113; HU E025740 T2 20160530; JP 2013534972 A 20130909; JP 5727601 B2 20150603; KR 101632470 B1 20160621; KR 20130112731 A 20131014; MX 2012015048 A 20130215; MX 336103 B 20160108; PL 2588646 T3 20160331; US 2013202797 A1 20130808; US 9550208 B2 20170124; WO 2012000894 A1 20120105
DOCDB simple family (application)
DE 102010030697 A 20100630; BR 112012033494 A 20110624; CA 2802035 A 20110624; CN 201180031918 A 20110624; EP 11730611 A 20110624; EP 2011060590 W 20110624; ES 11730611 T 20110624; HU E11730611 A 20110624; JP 2013517208 A 20110624; KR 20127034254 A 20110624; MX 2012015048 A 20110624; PL 11730611 T 20110624; US 201213718342 A 20121218