1. Neodymium magnets are mainly composed of neodymium, iron and boron. The iron in the magnet will rust if exposed to air.
2. That’s why all the strong neodymium magnets in our factory are covered with protective coating, the protective coating is very thin (micron level) and has no effect on the adhesion of the neodinio magnet.
3. Neodymium magnets are available in many different coating and plating options. The most common coating for neodymium magnets is nickel plating. Although often referred to simply as “nickel plating,” this nickel option is actually a three-layer plating consisting of a nickel layer, a copper layer, and a nickel coating.
4. Commonly used nickel (NI-CU-NI), zinc, copper, epoxy resin, gold, silver, passivation, PVC coating, etc.