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:
Mar. 25, 2014
Filed:
Jan. 31, 2011
Franz-adolf Czika, Neuss, DE;
Sophie Cornen, Duesseldorf, DE;
Jens Kroemer, Duesseldorf, DE;
Michael Frank, Neuss, DE;
Nicole Teubert, Herne, DE;
Jan-willem Brouwer, Willich, DE;
Franz-Adolf Czika, Neuss, DE;
Sophie Cornen, Duesseldorf, DE;
Jens Kroemer, Duesseldorf, DE;
Michael Frank, Neuss, DE;
Nicole Teubert, Herne, DE;
Jan-Willem Brouwer, Willich, DE;
Henkel AG & Co. KGaA, Duesseldorf, DE;
Abstract
The present invention relates to a method for improving the corrosion-protecting pre-treatment of metal surfaces and using rinse water in a manner to conserve resources in such a corrosion-protecting pre-treatment, comprising a conversion treatment step using an aqueous composition comprising at least 50 ppm of the elements B, Si, Ti, Zr and/or Hf in the form of water-soluble compounds at a pH value of 3 to 5.5, wherein a minimum fraction of 10 ppm of the elements B, Si, Ti, Zr and/or Hf in the form of water-soluble compounds is present in the last pre-rinse step and a portion of the aqueous composition of the conversion treatment step is contained in the first post-rinse step. The resource-conserving use of the rinse water is accomplished according to the invention by way of a cascaded return of rinse water from the last rinse step to the first rinse step. The present invention also relates to a metallic component treated using the method according to the invention and to the use thereof in a process for applying a multi-coating system, in particular a paint system containing an organic binder, in industrial manufacturing.