China Neodymium And Ferrite Magnets Manufacturer & Supplier 
Have magnet problems, welcome to dongguan courage magnet FAQ column, currently brings together nearly 400 questions about magnets, to help many users solve the doubts in their hearts, today brings you is the common bad phenomenon of magnets are what are introduced, divided into appearance, size, magnetic strength, magnetics and other aspects.
1、Magnet bad phenomenon - appearance
The appearance defects of the magnet mainly include lack of material, foaming, cutting edge off corners, knife marks, trachoma, pitting, scratches and so on.
The picture below is a circular convex step magnet defect - missing material
2、 Magnet bad phenomenon - size
Dimensional defects such as the diameter or length of the magnet, width, thickness is large or small, not within the tolerance range, resulting in the product can not be installed, some products need positive tolerances, some need negative tolerances, this QC can be found when testing.
3、The bad phenomenon of magnets - magnetism
Magnetic is not enough is one of the common bad phenomena, suction will not lead to suction, this phenomenon may be the customer in the choice of magnet size and performance level of the problem, it may also be the magnet manufacturers wrong materials and other problems, usually can be improved by increasing the thickness of the magnet or improve the performance of the magnet grade.
4、Bad phenomena in magnetization
The common disadvantage of magnetization is that the direction of magnetization is reversed, and the magnetization is not saturated.
5、Plating defect
Problems such as blistering, peeling, uneven thickness of the plating, which will affect the corrosion resistance and service life of the magnet.
If you find an adverse phenomenon when using the magnet, it is recommended to check whether the surface of the magnet is damaged, to exclude the influence of the external magnetic field, and pay attention to the correct use and storage methods to ensure the normal operation of the magnet, for serious adverse phenomena, may need to replace the magnet or seek the help of the manufacturer.
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