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:
Dec. 29, 2020
Filed:
Feb. 02, 2017
Salzgitter Flachstahl Gmbh, Salzgitter, DE;
Volkswagen Ag, Wolfsburg, DE;
Thomas Koll, Braunschweig, DE;
Marc Debeaux, Hildesheim, DE;
Friedrich Luther, Gehrden, DE;
Haucke-Frederik Hartmann, Herzberg, DE;
Jan-Frederik Lass, Wolfsburg, DE;
Matthias Graul, Brome, DE;
Salzgitter Flachstahl GmbH, Salzgitter, DE;
Volkswagen Aktiengesellschaft, Wolfsburg, DE;
Abstract
In an aluminium-based coating for steel sheets or steel strips, the coating includes an aluminium-based coat applied in a hot-dip coating method, a covering layer containing aluminium oxide and/or hydroxide being arranged on the coat. The covering layer is produced by plasma oxidation and/or hot water treatment at temperatures of at least 90° C., advantageously at least 95° C., and/or steam treatment at temperatures of at least 90° C., advantageously at least 95° C. Alternatively, the covering layer containing aluminium oxide and/or hydroxide can be produced by anodic oxidation, the coat being produced in a molten bath with a Si content of between 8 and 12 wt. %, and an Fe content of between 1 and 4 wt. %, the remainder being aluminium.