English
中文简体A neodymium magnet is a rare earth permanent magnet made from an alloy of iron, neodymium, and boron to form a
tetragonal crystalline structure. Every permanent magnet contains some form of iron as it has the most dramatic ferromagnetic properties of all elements. Because of their high iron content (64-68%), neodymium magnets are also highly susceptible to corrosion in damp environments, especially along with the boundary interface of a sintered magnet. This type of corrosion can cause serious deterioration including crumbling of a magnet into a powder of small magnetic particles or spalling of a surface layer. To prevent corrosion, most neodymium magnets are plated with a three-layer, nickel-copper-nickel plating. This particular plating combination performs better than zinc plating or other solutions in most applications.
