What are the surface treatment methods for bonded NdFeB magnets?

Bonded NdFeB magnets are widely used in the modern industrial field, and their excellent magnetic properties play an irreplaceable role in motors, transmissions, robots and other fields. In order to give full play to the performance of NdFeB magnets, it is necessary to effectively treat their surfaces to ensure that they are not damaged during use. Next, let's take a look at the surface treatment methods of bonded NdFeB magnets.

Plating treatment is a common method for surface treatment of bonded NdFeB magnets. By treating bonded magnets with electroplating, chemical plating and other methods, the oxidation and corrosion of the magnet surface can be effectively reduced, and the hardness and wear resistance of the magnet surface can be improved. In the plating process, electro-immersion, electro-deposition, solution deposition and other methods are generally used. Among them, electro-deposition technology has the advantages of low cost and good effect, and can also be fully automated.

Surface film treatment is also a common way to treat the surface of bonded NdFeB magnets. By sticking a layer of polymer film on the surface of the magnet, the magnet can be effectively protected from oxidation, corrosion and other effects, and the brightness and gloss of the magnet surface can also be improved. The film materials generally include polyurethane, polyimide, epoxy, asphalt, resin and other options.

Chemical treatment is also an effective surface treatment method for bonded NdFeB magnets. It is mainly treated by solution treatment or laser treatment, which can effectively remove stains, impurities and other substances on the surface of the magnet, repair its surface defects, and improve the surface flatness and corrosion resistance of the magnet.

The above are three commonly used surface treatment methods for bonded NdFeB magnets. When choosing, it is necessary to comprehensively consider the specific application environment, production cost and technical requirements, and choose the most suitable surface treatment method.