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Quality testing method for strong neodymium-iron-boron magnets

The powerful magnets are exactly strong neodymium-iron-boron magnets, the performance quality of the strong neodymium-iron-boron magnets are better than that of the ferrite magnets, a strong neodymium-iron-boron magnet can absorb 640 times heavier weight than itself,the title of "king of magnetism" is the result.
You do not know the quality of the powerful magnets bought on the market,what’s the quality testing method for fast detection of powerful NdFeB magnets?

The testing of the strong magnets NdFeB is mainly evaluated from two aspects: 1, product performance, 2, product appearance

First, product performance:
The main indicators are the remanence, the coercive force, the magnetic energy product, and so on.The strong NdFeB magnets with different sizes can be distinguished by Gauss,Gauss can be used to distinguish the quality and performance of the magnet.The coercive force can only be tested by a magnetic property tester, which is generally not given to the user test.

Second, the appearance of the product:
Take the magnets to detect the appearance of the product, mainly to look at the 5 aspects of the appearance
(1)electroplating tumor, slag layer,bubble
(2)edge collapse, residual material;
(3)scratch marks, marks, nail scratches etc.;
(4)cracking and so on;
(5)pinhole porosity, particle, sand etc.,

And see if there is a missing corner around it, whether electroplating is perfect or not, whether the size meet the design requirements or not, all NdFeB magnets have coating which used to prevent the surface of the magnet from being corroded and rusty.The magnets with same specification placed on an adsorbed plane, which can be used to identify the size of the magnetic force.

If the user needs to compare the powerful magnets, the magnetic properties of the tested magnet can be understood by the demagnetization curve class analysis.
The above are the test methods of a strong NdFeB magnet quality, hope to help you quickly identify the quality of a powerful magnet.
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