NdFeB Magnet - Phosphating Process

August 15, 2022
Latest company news about NdFeB Magnet - Phosphating Process

NdFeB Magnet - Phosphating Process

NdFeB magnets are widely used in computers, electronics, communications and other fields. Due to the poor corrosion resistance of NdFeB magnets, it is very easy to react with oxygen and water vapor in the air, resulting in magnet oxidation, which directly affects the performance of the magnet. Life, therefore, requires a corrosion-resistant, oxidation-resistant surface treatment of the magnets.


A product is made of NdFeB material. In order to achieve anti-corrosion and improve the bonding strength of the subsequent process, the customer requires the surface of the magnet to be phosphated.


Phosphating process

1. Rolling and chamfering-2. Sandblasting-3. Chemical degreasing-4. Cleaning-5. Rust removal-6. Cleaning-7. Surface adjustment-8. Phosphating at room temperature-9. Water washing-10. Passivation--11 closed dry


Process Description

1. The NdFeB material and abrasive are put into the grinder for grinding using a vibrating grinder

2. Sandblasting can remove obvious rust on the surface and avoid strong corrosion in the subsequent process

3. Weak alkaline substances are used for degreasing, and anionic surfactants are the main components. Ultrasonic waves can be used to enhance degreasing effect.

4. It is enough to use a rust removal method of a price-adjusted corrosion inhibitor,

5. Phosphating adopts normal temperature phosphating

6. Passivation Improve the corrosion resistance of phosphating film



The phosphating process can obtain a uniform phosphating film on the surface of the NdFeB magnet, and has strong corrosion resistance.

The surface of the part treated by the phosphating process has good adsorption, which is conducive to the bonding of the subsequent process.

After phosphating, the color of the product is uniform and the surface is clean. It can be vacuum packaged, which greatly prolongs the storage time.