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. 27, 2019
Filed:
Oct. 16, 2014
Chemetall Gmbh, Franfurt am Main, DE;
Benjamin Güttler, Bad Nauheim, DE;
Ralf Schneider, Frankfurt, DE;
Frank Hollmann, Biberbach, DE;
Gorka De Luis Garcia, Logroño, ES;
Iñaki Nieves Quintana, Amurrio, ES;
Martin Orben, Schöneck, DE;
Norbert Schwinke-Kruse, Bad Münstereifel, DE;
Chemetall GmbH, Frankfurt am Main, DE;
Abstract
Methods for treatment shaped bodies are described herein. The methods generally include contacting at least one shaped body with an aqueous acidic composition to form a conversion layer on a surface of the at least one shaped body, wherein the surface includes iron or steel and a carbon content in a range of 0 to 2.06 wt. % and a chrome content in a range of 0 to <10 wt. % and wherein the surface is optionally galvanized or alloy galvanized. The aqueous acidic composition includes water; from 2 to 500 g/L oxalic acid; and from 0.01 to 20 g/L of at least one catalyst based on guanidine, nitrate or combinations thereof, wherein a pickling removal of the aqueous acidic composition is in a range of 1 to 6 g/m.