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:
Oct. 25, 2022
Filed:
Oct. 04, 2019
Henkel Ag & Co. Kgaa, Duesseldorf, DE;
Jan-Willem Brouwer, Willich, DE;
Frank-Oliver Pilarek, Bergheim, DE;
Fernando Jose Resano Artalejo, Duesseldorf, DE;
Jens Kroemer, Neuss, DE;
Matthias Hamacher, Huerth, DE;
Marc Balzer, Duesseldorf, DE;
Henkel AG & Co. KGaA, Duesseldorf, DE;
Abstract
The invention relates to a method for zinc phosphating components so as to form layers, said components comprising surfaces made of steel with a high tolerance against aluminum dissolved in the zinc phosphating bath, wherein the precipitation of poorly soluble aluminum salts can be largely prevented. In the method, a process is used of activating the zinc surfaces by means of dispersions containing particulate hopeite, phosphophyllite, scholzite, and/or hureaulite, wherein the proportion of particulate phosphates in the activation process must be adapted to the quantity of free fluoride and dissolved aluminum in the zinc phosphation.