| 简介 |
An object of the present invention is to provide an R-Fe-B based sintered magnet having on a surface thereof a chemical conversion film with higher corrosion resistance than a conventional chemical conversion film such as a phosphate film, and a method for producing the same. The R-Fe-B based sintered magnet having a chemical conversion film on the surface thereof of the present invention as a means for achieving the object is characterized by comprising a chemical conversion film on a surface of an R-Fe-B based sintered magnet wherein R is a rare-earth element including at least Nd, the chemical conversion film having a laminate structure including at least an inner layer that contains R, fluorine, and oxygen as constituent elements and an outer layer that is amorphous and contains Zr, Fe, and oxygen as constituent elements, provided that no phosphorus is contained in the film. |
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