EP 2489448 B1 20131225 - In-line surface treatment for obtaining aluminium extrusions coated with a corrosion-resistant layer
Title (en)
In-line surface treatment for obtaining aluminium extrusions coated with a corrosion-resistant layer
Title (de)
Inline-Oberflächenbehandlung zur Herstellung von Aluminiumstrangpressprofilen mit korrosionsbeständiger Beschichtung
Title (fr)
Traitement de surface en ligne pour obtenir des extrusions d'aluminium revêtues avec une couche résistante à la corrosion
Publication
Application
Priority
EP 11001244 A 20110216
Abstract (en)
[origin: EP2489448A1] Process for manufacturing aluminium alloy extruded profile parts which are resistant to the corrosion resulting from their contact with the air and humidity, comprising the following steps: a) providing a billet; b) extruding the billet through a die to create at least one profile having the desired shape and length and optionnally cooling or quenching the profile after the exit of the die; c) optionally stretching the profile; d) sawing the extruded profile to obtain profile parts at the desired length; characterised in that during step b) a corrosion-resistant layer is coated on the fresh metal surface exiting from the extrusion press by spraying a fluid solution near the exit of the die. The fluid solution is preferably a sol gel medium made from mixing a polysiloxane solution and an aqueous colloidal silica solution. Profile parts coated with a corrosion resistant layer obtained by the said process.
IPC 8 full level
B21C 23/00 (2006.01); B05D 1/02 (2006.01); B21C 23/01 (2006.01); C23C 18/12 (2006.01); C25D 11/04 (2006.01)
CPC (source: EP)
B21C 23/002 (2013.01); B21C 23/01 (2013.01); B21C 35/02 (2013.01); B21C 35/023 (2013.01); C23C 18/122 (2013.01); C23C 18/1241 (2013.01); C23C 18/1254 (2013.01); C23C 18/127 (2013.01); B05D 1/02 (2013.01); B05D 3/0254 (2013.01); B05D 2202/25 (2013.01)
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)
DOCDB simple family (application)
EP 11001244 A 20110216