3M adhesive magnets are being used more and more in our daily lives. It consists of neodymium magnets and high-quality 3M self-adhesive tape. Products are widely used in gifts, household appliances, automobiles, mobile phones, packaging, toys and electronic instruments, mechanical equipment and other fields.
Unlike gold, zinc and nickel, an epoxy magnet coating acts as an excellent barrier to salt, ambient air, water or moisture. But it's slightly more expensive than the first three alternatives. Although it is easy to scratch, with a thickness of 15-30 um, it has good adhesion to steel with magnetic glue. Epoxy coatings are mainly used in the Marine, motor, sensor, automotive and consumer goods industries.
The surface treatment of NdFeb magnet is not to improve its performance, and the surface coating of neodymium magnet mainly plays a protective role. No surface coating of NdFeb strong magnets, it is easy to react with oxygen in the air and quickly oxidize, so in order to prevent this from happening, we usually carry out plating treatment. Moreover, the appearance of the strong magnet after electroplating is more beautiful.
Nickel-plated Ndfeb magnets are made from an alloy of neodymium, iron & boron and are plated with a triple layer of: Ni-Cu-Ni (Nickel-Copper-Nickel) using an electrolytic based process for maximum protection against corrosion & oxidation.
Neodymium(NdFeB) magnets are the strongest type of rare earth magnet commercially available and are manufactured in a wide range of shapes, sizes and grades.