| 摘要 |
PURPOSE:To improve the corrosion-preventing property of a permanent magnet effectively without incurring deterioration of characteristics by a method wherein a metal coating, on which inorganic fine particles are dispersed, is provided on the surface. CONSTITUTION:Not only corrosion-resisting metal, but also sacrificial rust- resisting metal and the like is suitable as a coating metal material. Also, the wet method such as electroplating or non-electrolytic plating and the like is suitable as a coating method. Oxide particles and pigment fine particles are suitable as the inorganic fine particles to be dispersed into metal coating. It is considered suitable that one or two or more kinds of the above-mentioned particles are added to the plating solution, they are suspended and dispersed into the coating layer by performing a plating treatment. Moreover, the improvement in corrosion-resisting property can be achieved by conducting a treatment on the metal-coated surface using one kind or two or more kinds of coupling agents. |
