NdFeB is divided into sintered NdFeB and bonded NdFeB two kinds, bonded NdFeB in all directions are magnetic, corrosion resistance; And sintered neodymium iron boron because of easy corrosion, the surface needs coating, generally galvanized, nickel, environmental zinc, environmental nickel, nickel copper nickel, environmental nickel copper nickel and so on. And sintered NdFeB is generally divided into axial and radial magnetization, according to the required working face.
NdFeB surface treatment:
With the thawing of sintered NdFeB in Japan, Germany, the European Union and other patented technologies, and the concerted efforts of major sinter manufacturers in China, the grade of sintered NdFeB products has been greatly improved. As the high-tech application field of its comprehensive performance continues to improve, the requirements for its sintered NdFeB surface treatment have been greatly improved, the traditional treatment methods have been unable to meet the requirements of the industrial chain progress. University of electronic science and technology, sichuan university, jiaotong university, reishi reith and other scientific research institutions, from the micro molecular structure, from the essence of the principle of surface treatment and industrial application process development, after 4 years of efforts and made a breakthrough in key technology. Nano (3010) chelated film without coating treatment, the technology is an original technology process, nano film layer contains active groups with strong resistance to moisture, oxygen, chloride ion (Cl), carbon dioxide (CO2), etc. Corrosion resistance and bonding ability of organic resins are greatly improved. Its excellent surface physical and chemical properties will have a significant impact on the application field.
In December 2013, the treatment process was tested by Sichuan University and Chinese Academy of Sciences. Its corrosion resistance meets the requirement of 20-30 years of use in Marine climate conditions, and it can be widely used in sea-based wind power generation. The surface bonding force is above 20MPa, which can be widely used in the fields of permanent magnet high-speed motor, special motor, electric vehicle motor, UHV, HVDC power supply system, quick charging system, aerospace, military industry and so on.
Common surface treatment methods:
1, Nano (Royce3010) chelated film without coating treatment; (3010 means that the film layer contains more than three active chelating groups, and the thickness of the film layer is 10 nanometers);
5, true air deposition;
6, electroless plating;
7, organic spray;