Epoxy coated rust-proof neodymium iron boron magnet is a high-corrosion-resistant NdFeB permanent magnet formed by covering a layer of high-performance epoxy resin protective film on the surface of sintered NdFeB magnet through spraying, curing and film-forming process. As an upgraded anti-corrosion NdFeB magnet product, it solves the problem of easy corrosion and rust of ordinary electroplated NdFeB magnets in harsh environments. The epoxy resin coating is a polymer organic protective layer, which has excellent sealing performance, can completely wrap the magnet base material, block the erosion of moisture, salt fog, acid and alkali media, and is the best surface protection process for NdFeB magnets used in humid, marine and corrosive industrial environments. The product retains the ultra-high magnetic performance of NdFeB magnets, and its anti-corrosion and anti-rust performance is far superior to nickel plating and zinc plating processes, making it a high-reliability permanent magnet material for harsh working conditions.

In terms of coating performance, the epoxy coating of rust-proof NdFeB magnets has outstanding advantages. The coating thickness is uniform and controllable, generally controlled at 0.03–0.1mm, with compact internal structure, no pores and no gaps, achieving 100% sealing protection. The coating has strong adhesion, after high-temperature curing, it is tightly combined with the magnet surface, not easy to peel, fall off and crack, and can resist mechanical friction, bending and impact without damage. The epoxy resin material has excellent chemical stability, strong resistance to acid, alkali, salt fog, oil stain and organic solvent corrosion, and can work stably in high humidity, high salt fog, coastal and chemical industrial environments for a long time. Through professional salt spray test verification, the salt spray resistance time of epoxy coated magnets can reach more than 500 hours, which is 5 times that of ordinary nickel-plated magnets, and the anti-rust and anti-corrosion effect is extremely significant.

In terms of comprehensive performance, epoxy coated rust-proof neodymium iron boron magnets have stable magnetic and mechanical properties. The epoxy coating process is a low-temperature curing process, which will not cause magnetic attenuation and structural damage to the NdFeB magnet base material, and completely retain the ultra-high magnetic energy product, strong magnetic force and stable magnetic field characteristics of the original magnet. The product has good insulation performance, the epoxy coating is an insulating material, which can effectively avoid electromagnetic conduction and short circuit, and improve the safety of electronic and electrical equipment. The surface of the coating is matte and delicate, with anti-slip and anti-scratch effects, and will not produce scratches and bright surface reflection, which is suitable for equipment scenarios with anti-reflection requirements. In addition, the product has strong aging resistance, ultraviolet resistance and high and low temperature resistance, and can maintain stable coating performance and magnetic performance in the environment of -40°C to 150°C for a long time, with a service life of more than 10 years in harsh environments.

Epoxy coated rust-proof neodymium iron boron magnets are mainly used in various harsh working environments that require high anti-corrosion and anti-rust performance. In the marine and shipbuilding industry, they are applied to ship electronic equipment, marine sensor magnetic parts, offshore platform mechanical magnetic components and underwater operation equipment accessories, adapting to high salt fog and high humidity marine environment. In the chemical and pharmaceutical industry, they serve as magnetic components of chemical reaction equipment, pharmaceutical production equipment and corrosive medium detection equipment, resisting acid and alkali corrosion. In the outdoor engineering field, they are used for outdoor monitoring equipment, street lamp sensing equipment, outdoor automation equipment and solar energy equipment magnetic parts, adapting to wind, rain and ultraviolet irradiation. In the automobile industry, they are applied to automobile chassis magnetic parts, engine peripheral accessories and new energy vehicle waterproof magnetic components, resisting mud, water and oil corrosion. In addition, they are also widely used in bathroom electrical equipment, humid environment intelligent equipment, food processing equipment and industrial corrosion-resistant automation equipment. As a high-reliability anti-corrosion magnetic material, epoxy coated NdFeB magnets provide stable and long-lasting magnetic solutions for equipment in harsh environments.