... surface coating:zinc,nickel,epoxy,gold SmCo magnet is a high performance,Iow temperature coefficient permanent magnet with its high working temperature-350 ... coated because it is difficult to be erodedand oxidized.SoCo magnet is widely used in motors,watch,transducers,instruments,positional ... ,various magnetismspreadingdevices,magnetic processor,electrical engineering and magnetic derrick. SmCo Magnet