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:
May. 06, 2014
Filed:
May. 31, 2012
Jan-willem Brouwer, Willich, DE;
Frank-oliver Pilarek, Köln, DE;
Jens Krömer, Düesseldorf, DE;
William E. Fristad, Rochester, MI (US);
Helene Maechel, Ostwald, FR;
Jan-Willem Brouwer, Willich, DE;
Frank-Oliver Pilarek, Köln, DE;
Jens Krömer, Düesseldorf, DE;
William E. Fristad, Rochester, MI (US);
Helene Maechel, Ostwald, FR;
Henkel AG & Co. KGaA, Duesseldorf, DE;
Abstract
The invention relates to an acidic, aqueous, chromium-free composition (A) for the anti-corrosive treatment of steel and/or galvanized steel surfaces comprising metal ions (M) selected from ions at least of the elements nickel, cobalt, molybdenum, iron or tin and a multi-stage method applying the composition (A) for the anti-corrosive pre-treatment of metal components which have steel and/or galvanized steel surfaces. The invention further relates to metal surfaces of zinc or iron having a passive layer system comprising at least 30 mg/mnickel and at least 10 mg/mzircon, titanium and/or hafnium and sulfur, wherein nickel is present in metallic form at up to at least 30 At. %, obtainable in a method according to the invention.