Anything will wear out when used, and magnets are the same, so they need to be considered. So what are the factors that cause magnetic loss of magnets? Let's talk about a few words today. Factors that cause magnetic loss include shedding of debris, corrosion, and temperature rise. High, external magnetic field, time, etc. are introduced in detail below.
1. The fragments fall off
Magnetic strength is directly dependent on physical size, so wear and tear and shedding of debris will result in a smaller magnetic force, and ferrite magnets are particularly prone to debris.
2. Corrosion
Destroying the physical structure by forcing the magnetic domains apart causing them to lose their orientation,
3. Temperature rises
Magnetic materials lose their magnetism when heated, but regain magnetism when cooled, provided that the maximum temperature is below the Curie temperature. Above the Curie temperature, magnets permanently lose all or part of their magnetism.
4. External magnetic field
Strong, opposing magnetic fields can cause the magnetic domains to lose orientation, resulting in a loss of magnetism.
5. Time
Although magnets become weaker over time, the natural demagnetization rate depends on operating temperature and external magnetic fields, which can take many years if the magnet remains below its maximum operating temperature.
The quality of the magnet
The quality of the magnet is also an important factor affecting the magnetism. If the quality of the magnet material is not good, the impurity content is high, and the energy is insufficient, the magnet will easily lose its magnetism during use. Therefore, when choosing magnets, be sure to choose materials from regular brands, and try not to choose low-priced, low-quality magnets.
There are many factors that go into choosing the best magnet for each application, including cost, required magnetic strength, corrosion resistance, shape, and operating temperature.
