Neodymium magnets are composed mainly of neodymium, iron and boron. If they are not plated, the iron in the material will oxidize very easily, particularly if exposed to moisture. Even normal humidity will rust any iron anywhere over time. That’s why, in order to preserve and protect the lasting performance of each magnet’s magnetic field, most neodymium magnets are plated or coated.
Nickel is the most common choice, as it is durable and cost-effective. Our magnets are coated with a triple plating of nickel-copper-nickel. This creates a shiny silver finish and provides dependable resistance to corrosion in most applications.