With the development of modern industry, the application scope of NdFeB magnets is becoming wider and wider, especially in the fields of electricity, machinery, electronics, computers, etc., and it has become one of the mainstream products of magnetic materials on the market. However, in actual production, due to the lack of effective surface treatment, the performance of the magnet cannot be fully released. Therefore, proper surface treatment is one of the important methods to maintain the quality of NdFeB magnets. This article will start from "bonded NdFeB magnets" and introduce some surface treatment methods.
Rationally choose oxide layer treatment: This method plays a role in avoiding poor bonding without magnification, making it more solid. When treating the oxide layer, it is necessary to first degrease and clean it, then perform phosphating treatment, and finally perform oxidation treatment to make an oxide film.
Use electroplating treatment method: This method can form an anti-corrosion protective layer on the surface of the magnet, which can effectively prevent the magnet from being oxidized. Electroplating technology is to plate a layer of organic matter or metal elements on the surface of the magnet, and it can also add color to the surface of the magnet.
Using dust adsorption layer: This method forms an adsorption layer on the surface of the magnet to adsorb dust and dirt, so as to effectively ensure the cleanliness and cleanliness of the magnet surface.
Cutting and polishing method: The surface treatment of the magnet is closely related to polishing, because the processing process may corrode the chemical properties of the resist from its surface, causing the surface roughness of the magnet to increase, affecting the resist magnetic performance and the quality of the joint, and also easily reducing the saturation magnetization intensity of the ferromagnetic material. Cutting and polishing can not only increase the surface roughness, but also increase the smoothness of the surface of the magnetic material, thereby improving the surface state of the magnetic material.
