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. 11, 2012
Filed:
Apr. 20, 2007
Yoshio Kimata, Tokyo, JP;
Atsushi Morishita, Tokyo, JP;
Akira Takahashi, Tokyo, JP;
Toshikazu Amemiya, Tokyo, JP;
Takayuki Kuwagaki, Tokyo, JP;
Hidetoshi Shindo, Tokyo, JP;
Ikuo Kikuchi, Tokyo, JP;
Yoshio Kimata, Tokyo, JP;
Atsushi Morishita, Tokyo, JP;
Akira Takahashi, Tokyo, JP;
Toshikazu Amemiya, Tokyo, JP;
Takayuki Kuwagaki, Tokyo, JP;
Hidetoshi Shindo, Tokyo, JP;
Ikuo Kikuchi, Tokyo, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
The present invention provides a composite coated zinc-containing plated steel material different from the plated steel materials treated by conventional chromate replacement technologies and superior in all of corrosion resistance, blackening resistance, coating adhesion, and alkali resistance. The composite coated zinc-containing plated steel material of the present invention is characterized by having a composite coating formed by coating and drying on the surface of a plated steel material a treatment solution containing a basic zirconium compound, vanadyl (VO)-containing compound, phosphoric acid compound, cobalt compound, organic acid, and water and having a pH 7 to 14, the composite coating containing, with respect to the Zr element as 100 parts by mass, V in an amount of 10 to 45 parts by mass, P in 5 to 100 parts by mass, Co in 0.1 to 20 parts by mass, and an organic acid in 10 to 90 parts by mass.