Preparation of the Zn-Al coating with high corrosion resistance on the sintered NdFeB magnets

Abstract

Summary form only given. Sintered NdFeB permanent magnets possess outstanding magnetic properties such as high coercive force and high energy products. In this study a new kind of protective coating is developed on NdFeB magnets surface.During the experiment zinc-aluminum coating firstly is prepared by the dipping and centrifuging method, then preheated at 373K for 15minutes in the furnace. Finally, under the high temperature conditions of 583K the coating is baked for 30 minutes.The morphology texture of the Zn-Al coating is observed by SEM. The phase structure of the Zn-Al coating is analyzed by XRD.