Classification of NdFeB

NdFeB is divided into sintered NdFeB and bonded NdFeB. Bonded NdFeB has magnetism and corrosion resistance in all directions. However, sintered NdFeB is easy to corrode and needs to be coated on its surface. Generally, there are zinc plating, nickel plating, environmental protection zinc plating, environmental protection nickel plating, nickel-copper nickel plating and environmental protection nickel-copper nickel plating. Sintered NdFeB generally has axial and radial magnetization, depending on the required working face.

NdFeB surface treatment:

With the thawing of patented technology of sintered NdFeB in Japan, Germany and European Union, and the joint efforts of major domestic sintering manufacturers, the grade of sintered NdFeB products has been greatly improved. As a high-tech application field, its comprehensive performance is constantly improving, and the requirements for surface treatment of sintered NdFeB are also greatly improved. Traditional treatment methods can no longer meet the requirements of industrial chain progress. Scientific research institutions such as Electronic Science and Technology University, Sichuan University, Jiaotong University, and Ruishi Reith all start with the micro-molecular structure. In essence, the principle of surface treatment and the development of industrial application technology have been improved. After four years of hard work, a breakthrough has been made in key technologies. Nano-(30 10) chelating film is not coated, which is an original technological process. The active groups contained in the nano-film layer have strong resistance to moisture, oxygen, chloride ion (Cl), carbon dioxide, etc. The corrosion resistance and adhesion of organic resin have been greatly improved.

From June, 2065438 to February, 2003, Sichuan University and China Academy of Sciences conducted systematic experiments on this treatment process. Its corrosion resistance can meet the requirements of 20-30 years under marine climate conditions and can be widely used in offshore wind power generation. The surface adhesion is more than 20Mpa, which can be widely used in permanent magnet high-speed motors, special motors, electric vehicle motors, UHV, high-voltage DC power supply systems, fast charging systems, aerospace military industries and other fields.

Common surface treatment methods:

1, nano-(Royce30 10/0) chelating membrane is not coated; (30 10 means that the film contains more than three active chelating groups, and the film thickness is10 nm);

2, phosphating;

3. Electroplating;

4. Electrophoresis;

5. Vacuum vapor deposition;

6. Electroless plating;

7, organic plastic spraying;