SURFACE TREATMENT METHOD FOR OBJECT TO BE TREATED, SURFACE-TREATED RARE EARTH PERMANENT MAGNET AND METHOD FOR INCREASING HARDNESS OF Al COATING FILM

摘要

PROBLEM TO BE SOLVED: To provide a surface treatment method for increasing the hardness of an Al coating film, preventing damages to the coating film due to low hardness, and thereby, effectively exhibiting characteristics such as corrosion resistance and adhesion durability to a resin adhesive, and to provide a surface-treated rare earth permanent magnet and a method for increasing the hardness of an Al coating film.;SOLUTION: The surface treatment method is characterized in that a wire type Al vapor deposition material containing Cu and/or Mg is vaporized while continuously supplied to a heated melting and vaporizing section so as to vapor deposit an Al coating film containing Cu and/or Mg by 0.1 wt.% to 20 wt.% on the surface of the object to be treated. The rare earth permanent magnet has an Al coating film containing Cu and/or Mg by 0.1 wt.% to 20 wt.% formed by vapor deposition on the surface of the magnet. The method for increasing the hardness of an Al coating film formed by vapor deposition on the surface of the object is characterized in that Cu and/or Mg is incorporated by 0.1 wt.% to 20 wt.%.;COPYRIGHT: (C)2005,JPO&NCIPI