How to test whether the magnet of neodymium magnet

The neodymium magnet, also called the neodymium iron boron magnet, its chemical formula is NdFeB, is a kind of artificial permanent magnet. So far, this is the strongest magnetic material, so it is known as the magnet of the king.

The quality detection of NdFeB magnet is mainly from two aspects to do the evaluation：

First, neodymium magnet product performance:
NdFeB magnet properties have a uniform standard, the main indexes are energy product, coercivity, remanence etc. NdFeB magnet of different sizes with gauss or flux table to distinguish material energy of the product is not possible. The coercive force level, can only use the static magnetic properties of the tester.

Second, neodymium magnet product appearance:
Neodymium Magnet appearance detection can be divided into five categories:
1, Nick (including scratches, line marks, tool marks, etc.)
2, Pitting (including pitting, pits, bubble, scars, slag layer and partial thickness, plating tumor)
3, Crack
4, Knock edge (including edge collapse, residual material)
5, Trachoma (including sand holes, porosity, pinhole, particles) to see whether there is a missing edge off angle, the plating layer is intact, size is meet the design requirements; neodymium iron boron in general, plating to protect its corrosion, rust.
Usually a same specifications of the magnet and put on a plane can be adsorbed, such as patch, a blade, a huge hand to identify the magnetic size.
If the magnet is relatively high, the most accurate way is to use the magnetic analyzer to measure the magnet demagnetization curve can.

this blog is published by China Neodymium Magnet manufacturer - RUISEN MAGNETICS CO.LTD. who professional supply Permanent magnet, Magnetic assembly, NdFeB magnetic device, etc.