Home > News

Related Problems Of Neodymium Iron Boron Strong Magnet

Nov. 12, 2019

Why is the neodymium iron boron strong magnet aging? How long can the magnetic properties of NdFeB magnets last? Many people are not very clear about these problems. Let us Ring Neodymium Magnet Factory explain to you one by one.


Many people think that it is because of the age and time of use, which leads to aging. In fact, there are many other factors affecting the problem of aging. For example, the problems of humidity and high temperature are also one of the main causes of aging.


Because the neodymium iron boron magnet has the characteristics of small volume and light weight compared with ferrite, there are various shapes and such as Cylinder Neodymium Magnet and massive neodymium magnets. The most important use of neodymium iron boron is to consider the magnetic force. It is also expected that in the next few decades, there will be no magnetic materials that replace the strong magnets of NdFeB. Two types of aging of neodymium iron boron magnets: moisture and high temperature.


1, wet

A humid or salty environment is not conducive to the preservation of NdFeB. Long-term in this environment will cause the surface of NdFeB to corrode, which will lead to the appearance of NdFeB aging.

The solution is to choose a coating for a 24-hour salt spray test or a 48-72 hour salt spray test for a longer period of time.


2, high temperature

NdFeB has N grades and M grades and other grades. Different grades have different maximum working temperatures and Curie temperatures. For example, the N-plate grade NdFeB has a maximum operating temperature of 80 °C. Above this temperature, there is a loss of magnetism of NdFeB. At Curie temperature, it completely loses its magnetism. Generally, when the highest temperature is reached, the magnet is damaged, resulting in aging damage of the NdFeB.


Internal Threaded Pot Magnet of NdFeB


Internal Threaded Pot Magnet of NdFeB


Then another question: How long can the magnetic properties of NdFeB magnets last?


Neodymium iron boron magnets have a relatively high coercive force, and there is no demagnetization and magnetic change under natural environment and general magnetic field conditions. Assuming that the environment is appropriate, the magnetic properties of the magnet will not be lost even after prolonged use. So in practical applications, we tend to ignore the influence of time factors on magnetic performance.


Many people know the characteristics of magnets and can hold iron. Physically, magnets attract iron, which is made of nickel and cobalt. Magnets can be used in many places because they affect the presence of electrical particles and electrical conductors. Magnets can also convert electrical energy into mechanical energy, which in turn can convert mechanical energy into electrical energy. Because of this characteristic, the magnet has become a position in the modern industry. There is no material to replace it. Foshan NdFeB magnets are now widely used in motors, electronics, steel, pigments, glass and other fields.


There are two main factors affecting the magnetic properties of NdFeB magnets, temperature and oxidation. When the temperature exceeds the maximum operating temperature range of the permanent magnet, the magnetism of the permanent magnet becomes weak or even disappears; when the plating layer is broken, the inside part is oxidized, and the magnetism of the permanent magnet is weakened and weakened. If they are not exposed to any of these conditions, the permanent magnet will still lose its magnetic properties, but this degradation is very slow, a percentage point reduction every ten years, so as long as it is used correctly, there is no need to worry about magnet demagnetization.


The above is the answer by the Internal Threaded Pot Magnet of NdFeB supplier related questions about NdFeB magnets, I hope to help everyone.

contact us
FOLLOW us