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:
Sep. 17, 2013
Filed:
Jan. 11, 2011
Chemical conversion treatment solution for a steel material and chemical conversion treatment method
Hitoshi Ishii, Kanagawa, JP;
Yasuhiko Nagashima, Kanagawa, JP;
Hitoshi Ishii, Kanagawa, JP;
Yasuhiko Nagashima, Kanagawa, JP;
Henkel AG & Co. KGaA, Duesseldorf, DE;
Abstract
A chemical conversion treatment solution for a steel material is provided. The solution is an acidic aqueous solution of pH 3 to 5 containing 50 to 500 ppm by weight of zirconium fluoride complex in terms of Zr, 5 to 50 ppm by weight of free fluorine, and 5 to 30% by weight in relation to Zr of polyethyleneimine having a weight average molecular weight of 300 to 10,000, a molar ratio of the primary amino group of at least 30%, and a molar ratio of the tertiary amino group of at least 15% in relation to the total amino group content. A method for chemical conversion treatment is also provided. This invention realizes excellent coating adhesion and corrosion resistance after the coating, as well as improved throwing power in the coating, and in particular, in the electrodeposition coating of a steel material.