Author Archives: kevin xu

Application of magnet in oil and gas pipeline inspection

Due to corrosion, cracks or damage, long-distance oil and gas pipelines may leak during use. Oil and gas leakage will not only pollute the surrounding environment of long-distance pipelines, but also may cause safety accidents such as combustion and explosion, resulting in huge economic losses. . Therefore, long-distance oil and gas pipelines need to be regularly[…]

Why the surface gauss cannot represent the actual performance of a magnet?

What is surface Gauss? The surface Gauss refers to the magnetic induction intensity at a certain point on the surface of the magnet, it is measured by Gauss meter, the unit is Gauss (Gs) or Tesla T (1T=10000Gs, 1mT=10Gs). It is the most widely used measurement method due to its convenience. How to measure the[…]

How do permanent magnets lose their magnetism?

Why are permanent magnets magnetic? Microscopically, the negatively charged electrons are spinning themselves while constantly revolving around the nucleus. The rotation of electrons creates an attractive or repulsive force, which we call magnetism. In most elements, the electrons in the same orbit have opposite spin directions, and the magnetic moments cancel each other out, showing[…]

How to separate strong magnets?

There are mainly two types of widely used strong magnets– samarium cobalt magnets and neodymium magnets commercially available. If you’ve never handled them before, you will probably be surprised by how powerful these magnets can be. Their magnetic energy product density is more than ten times that of AlNiCo magnets or ferrite magnets. Samarium cobalt[…]

Comparison and Substitutability of Samarium Cobalt Magnet and Neodymium Magnet

Magnetic Performance The magnetic performance of SmCo magnet is generally lower than that of Neodymium. The magnetic performance of a magnet is measured by its magnetic energy-(BH)max. The (BH)max of Sm2Co17 is about 28-33 MGOe, at the same time, the (BH)max of neodymium is around 33-52  MGOe. Temperature Resistance The working temperature of Neodymium magnet[…]

The Salt Spray Test of Neodymium Magnets

The Neodymium Magnet Test is important for magnet usage because the Neodymium magnet has the disadvantages like being easy to be corroded and oxidized. That is why neodymium magnets all need to be plated. The salt spray test is one of the important tests for the neodymium magnet. The salt spray test of Neodymium Magnets[…]

Surface Treatment of Neodymium Magnets

Neodymium permanent magnets have strong chemical activity and are very easy to be corroded and oxidized, so surface treatment is generally required. Conventional surface treatment methods include nickel plating, zinc plating, etc. Coating with different materials, the corrosion resistance of NdFeB magnets is completely different. The following lists some conventional surface treatment methods of Neodymium[…]

Electric permanent magnet chuck for moving steels

Magnetic chucks are gradually replacing mechanical hooks and become the main trend for lifting and moving steels. Magnetic chucks can be divided into three types: permanent magnetic chuck, electromagnetic chuck and electric permanent magnetic chuck. The permanent magnet chuck is mainly used to fix the workpiece during machining, it generally is not used for the[…]

How does temperature affect neodymium magnets?

Neodymium magnets perform better at lower temperatures, they even get stronger as the temperature gets lower. The lowest working temperature of neodymium magnets is around -138 ºC (135 K, -216 ºF), they performance best at this temperature. When the temperature drops below -138 ºC, the performance of neodymium magnets drops rapidly. However, the rapid decrease[…]

Magnetic Perfume Bottle Caps

Chanel was the first one to use the magnetic perfume bottle caps in their Les Exclusifs Collection de parfums, and then for their men’s Bleu de Chanel perfume. When you put the cap on the bottle, you don’t need to tighten it, the cap will automatically attract the bottle body. This design allows the bottle[…]