Causes of corrosion and magnetic degradation of rare earth magnets

Rare earth magnets are very important materials and are widely used in electronics, machinery, medical and other fields. However, if not properly used and maintained, rare earth magnets can experience magnetic degradation and corrosion. This article will introduce the causes of magnetic degradation and corrosion of rare earth magnets and provide some effective solutions.

The reasons for magnetic degradation are as follows:

1. Formation of oxides. The manufacturing process of rare earth magnets produces oxides, which adhere to the surface of the magnet and cause the magnet to weaken. At this time, we can remove the attached oxides and restore the magnet's magnetic force by regularly cleaning and polishing the magnet surface.

2. Improper use of high-temperature ovens. If a high-temperature oven is used during the manufacturing process, the temperature is too high or the time is too long, which can cause the magnetic force of rare earth magnets to degrade. Therefore, when using a high-temperature oven, you must pay attention to temperature and time control to ensure that the rare earth magnets are not damaged by heat.

3. During the storage and use of rare earth magnets, if they are impacted or vibrated by external forces, the magnetic force of the magnets will also decrease. At this time, we should protect the rare earth magnets as much as possible to avoid the influence of any external force.

The reasons for the corrosion of rare earth magnets are also as follows:

1. The chemical properties of rare earth magnets are unstable and they are prone to chemical reactions with some chemical substances and cause corrosion. Therefore, when using rare earth magnets, care should be taken to avoid contact with chemicals such as acids, alkalis, and salts to avoid corrosion.

2. Uneven coating or defects on the surface of rare earth magnets can also cause corrosion. Therefore, during the production process of rare earth magnets, it is necessary to pay attention to the quality of the coating and repair defects in the coating in time to prevent corrosion.

3. Water oxidation during the use of rare earth magnets can also cause corrosion. Therefore, when using magnets, care should be taken to avoid contact with water or other liquids, and they should be kept dry during storage to avoid water oxidation corrosion.