The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 12, 2014
Filed:
Apr. 22, 2009
Jan-willem Brouwer, Willich, DE;
Jens Krömer, Düsseldorf, DE;
Matthias Hamacher, Hürth, DE;
Stephan Winkels, Mönchengladbach, DE;
Frank-oliver Pilarek, Köln, DE;
Marc Balzer, Monheim, DE;
Jan-Willem Brouwer, Willich, DE;
Jens Krömer, Düsseldorf, DE;
Matthias Hamacher, Hürth, DE;
Stephan Winkels, Mönchengladbach, DE;
Frank-Oliver Pilarek, Köln, DE;
Marc Balzer, Monheim, DE;
Henkel AG & Co. KGaA, Duesseldorf, DE;
Abstract
The present invention relates to an aqueous composition and to a method for the anticorrosion conversion treatment of metallic surfaces, particularly metallic materials which are assembled into composite structures, comprising steel or galvanized or alloy-galvanized steel and any combinations of these materials, the composite structure being composed at least in part of aluminum or the alloys thereof. The aqueous composition according to the invention is based on a phosphating solution and contains, in addition to water-soluble compounds of zirconium and titanium, a quantity of free fluoride in a ratio that both permits phosphating of the steel and galvanized and/or alloy-galvanized steel surfaces and determines low pickling rates with regard to the aluminum substrate with simultaneous passivation of the aluminum. The metallic materials, components and composite structures conversion treated in accordance with the underlying invention are used in automotive body construction, in shipbuilding, in construction and for the production of white goods.