Coatings of rare earth ndfeb magnet: Passivation, Nickel, Zinc, Tin, Aurum, Copper, Epoxy, Chemical, etc.

Surface	Coating	Thickness (Microns)	Color	Resistance
Passivation		1	Silver grey	Temporary protection
Nickel	Ni+Ni	10-20	Silver bright	Excellent to humidity
	Ni+Cu+Ni
Zinc	Zn	8-20	Shining light blue	Good to salt spray
	Cu-Zn		Shining color	Excellent to salt spray
Tin	Ni+Cu+Sn	15-20	Silver	Superior to humidity
Aurum	Ni+Cu+Au	10-20	Shining gold	Superior to humidity
Copper	Ni+Cu	10-20	Shining gold color	Temporary treatment
Epoxy	Ni+Cu+Epoxy	15-25	Black, red, grey color	Excellent to climate humidity and salt spray
	Zn+Epoxy
Chemical	Ni	10-20	Silver grey	Excellent to humidity

Applications of rare earth ndfeb magnet: sensors, motors, rotors, wind turbine,wind generators, loudspeakers, magnetic hooks, magnetic holder, filters automobiles, Toys, packing boxes, magnetic buttons, jewelry, micro-special electric machinery, audio equipments, permanent-magnet instrumental meters, electronic industry, auto industry, nuclear magnetic resonance equipments, magnetic transmission gears and magnet therapy equipment, sorption, ads, books managements, teaching tools and other office automation, magnet toys, aero generators, magnetic toys, magnetic separators, magnetic bracelets, magnetic necklaces, copiers, magnetic rolls, synchrotrons, radiation sources, free electron lasers, nuclear industry, agriculture, detection earthquake.and so on.