Although NdFeB permanent magnets are called powerful magnets, they are also called "permanent magnets" by many people. From the surface point of view, the magnetic force is very strong, and it never demagnetizes. Many people mistakenly think that this is the case. Not exactly like this
NdFeB permanent magnet
I can often hear all kinds of customers say: "Isn't the Internet saying that NdFeB is a permanent magnet? Why didn't the magnetic force disappear after a long time?" In fact, this may be because of improper use or other reasons, otherwise it is impossible to be so fast. Demagnetization, in general, the magnetic properties of NdFeB permanent magnets can be maintained for about 30 years if used within the normal range.
There are two main factors affecting the life of NdFeB permanent magnets: corrosion and demagnetization.
NdFeB permanent magnet
NdFeB itself is a material that is easy to corrode, so the surface must be plated for a long time, but if the factory plating process is lacking or the non-standard raw materials are used, it may take less than 1 year to peel or powder on the surface. It was gone.
Another point is demagnetization, which is a situation that customers often encounter. The main reason for demagnetization is the high temperature. The neodymium-iron-boron permanent magnet that has been demagnetized, especially at high temperatures, loses its magnetic properties. Even if it is re-magnetized, it will not return to its original performance because the inside of the magnet has already occurred. Changed, irreparable
