What problems will occur if rare earth NdFeB magnets are not electroplated?

Rare earth NdFeB magnets are one of the most widely used magnet materials at present. Their high magnetic properties, excellent corrosion resistance and processing performance make them widely used in many fields, such as motors, automobiles, electronics, etc. However, if they are not electroplated during manufacturing and use, the following problems will occur:

1. Easy to corrode

Rare earth NdFeB magnets contain easily corroded metal elements such as iron and cobalt in their composition. If they are used directly without electroplating, they will be oxidized by oxygen and water vapor in the air, causing iron and cobalt to corrode, and even forming iron-cobalt oxides, causing the magnets with extremely strong magnetic force to lose their magnetism in a short time.

2. Easy to oxidize

The magnetism of rare earth NdFeB magnets mainly comes from NdFeB crystals, but NdFeB crystals are very susceptible to oxidation. If they are not electroplated, oxygen or water molecules in the air will quickly oxidize the crystal surface, causing the magnetic force to continue to decline.

3. Unsmooth surface

During the manufacturing process of rare earth NdFeB magnets, there are often some burrs and tiny particles on the surface, which have adverse effects on their performance and life. If used directly, these burrs and particles will make the surface of the magnet rough, resulting in reduced magnetism and shortened service life of the rare earth NdFeB magnet.

4. Poor corrosion resistance

Rare earth NdFeB magnets contain metal elements. If they are not treated for a long time, they will corrode, which will not only reduce the magnetism of the rare earth NdFeB magnets, but also destroy their surface beauty, greatly reduce their corrosion performance under pressure, humidity, temperature and other environments, and thus reduce their service life.