Anti-corrosion surface treatment technology of neodymium magnet

Anti-corrosion surface treatment technology of neodymium iron boron magnet:

With the thawing of sintered NdFeB patented technologies in Japan, Germany, and the European Union, and the concerted efforts of major sintering manufacturers in China, the performance of sintered NdFeB products has been greatly improved. As a high-tech application field, its comprehensive performance has been continuously improved, The requirements for the surface treatment of its sintered NdFeB have also been greatly increased, and traditional treatment methods have been unable to meet the requirements of the progress of the industrial chain. The University of Electronic Science and Technology of China, Sichuan University, Jiaotong University, Rui Shilai and other major scientific research institutions in China, from microscopic molecules Starting with the structure, essentially perfecting the principle of surface treatment and the development of industrial application processes, after 4 years of hard work, we have achieved key technical developments.

NdFeB surface anti-corrosion coating technology breakthrough, nano-chelating film without coating treatment, this technology is an original technological process, the active group contained in the nano-film layer has strong resistance to moisture, oxygen, chloride ions (Cl), carbon dioxide (co2), etc. Corrosion resistance and the adhesion performance of organic resins have been 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 the Chinese Academy of Sciences. Its corrosion resistance meets the requirements of 20-30 years of use in marine climate conditions. It can be widely used in sea-based wind power generation. The surface adhesion force is more than 20Mpa and can be widely used in permanent Magnetic high-speed motors, special motors, electric vehicle motors, ultra-high voltage, high-voltage DC power supply systems, fast charging systems, aerospace and military industries.

Common surface treatment methods:

1. Nano (Royce3010) chelating film without coating treatment; (3010 means that the film contains more than three active chelating groups, and the film thickness is 10 nanometers);

2. Phosphating;

3. Electroplating;

4. Electrophoresis;

5. Vacuum vapor deposition;

6. Electroless plating;

7. Organic spray.