The Dual Bottom Line of Technological Development

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Neodymium iron has high magnetic energy, astonishing residual magnetic strength, and coercivity, far exceeding similar permanent magnet materials in terms of magnetic field strength. However, like many high-performance materials, NdFeB alloys also come with a series of safety and environmental issues during use and processing, which not only concern the health of operators but also the sustainable development of the ecological environment.

The magnetic properties of Neodymium Iron are the basis for its wide application. Due to its high remanence, high coercivity, and high magnetic energy product, NdFeB magnets have been widely used in various fields such as electric motors, generators, sensors, MRI equipment, and wind power generation. However, it is precisely these good magnetic properties that pose magnetization risks in neodymium iron alloys during use.

A strong magnetic field may cause interference or harm to surrounding electronic devices, precision instruments, and even human health. Therefore, preventing magnetization is a safety guideline that must be strictly followed during the use of neodymium iron alloys. When handling it, operators should wear anti-magnetic gloves, use anti-magnetic tools, and ensure that the work area is away from equipment that is susceptible to magnetic field interference.

The corrosion resistance of neodymium iron is also a concern. The neodymium element in alloys has strong reactivity and is prone to chemical reactions with oxygen, moisture, and other substances in the air, causing surface corrosion of the alloy and affecting its magnetic properties and service life. To improve the corrosion resistance of NdFeB, surface coating treatments such as spraying anti-rust paint, electroplating, etc. are usually adopted. In addition, during use, the alloy surface should be kept clean and dry to avoid direct contact with corrosive substances.

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