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. 01, 2016
Filed:
Jul. 30, 2009
Atsushi Kikugawa, Osaka, JP;
Koshi Yoshimura, Osaka, JP;
Yoshimi Tochishita, Hyogo, JP;
Masanao Kamachi, Saitama, JP;
Nobuhiro Misumi, Hyogo, JP;
Atsushi Kikugawa, Osaka, JP;
Koshi Yoshimura, Osaka, JP;
Yoshimi Tochishita, Hyogo, JP;
Masanao Kamachi, Saitama, JP;
Nobuhiro Misumi, Hyogo, JP;
HITACHI METALS, LTD., Tokyo, JP;
Abstract
An object of the present invention is to provide an R—Fe—B based sintered magnet that exhibits excellent corrosion resistance and maintains excellent adhesion strength to an adherend even under severe conditions, and a method for producing the same. A corrosion-resistant magnet of the present invention as a means for achieving the object is characterized by comprising a chemical conversion film containing at least Zr, V, Al, fluorine, and oxygen as constituent elements and not containing phosphorus over a surface of an R—Fe—B based sintered magnet with a film made of Al or an alloy thereof therebetween.