Tag: SmCo Magnet

Export License for Rare Earth Magnets, Dual-use Items

The Impact of China’s Export Control Policies on Rare Earth Magnets

In order to safeguard national security and interests and fulfill international obligations such non-proliferation, China issued the Announcement No. 18 of 2025 of The Ministry of Commerce and The General Administration of Customs of The People’s Republic of China Announcing the decision to implement export control on some medium and heavy rare earth related items on April 4, 2025. According to that announcement, seven rare earth elements (REEs) including samarium (Sm), gadolinium (Gd), terbium (Tb), dysprosium (Dy), lutetium (Lu), scandium… Read More

Corrosion Resistance of Rare Earth Permanent Magnets

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In the Rare Earth Permanent Magnets family, the 1st generation 1:5 type SmCo magnets and 2nd generation 2:17 type SmCo magnets have high corrosion resistance due to the high cobalt content. Just like ferrite/ceramic magnets and AlNiCo magnets, SmCo magnets usually do not need any treatment for applications. The 3rd generation NdFeB magnets, however, are not the same. Although they have superior magnetic properties, they are more vulnerable to corrosion in humid environments, resulting in the deterioration of magnetic properties… Read More