Black Neodymium Magnets

Name: Black Neodymium Magnets
Brand: Ningbo Beilun Meank Magnetics Co.,Ltd.

Rare earth Nd-Fe-B permanent magnet material is a kind of high performance and strong magnetic material, which is one of the key materials for miniaturization and super miniaturization of micro motor. However, this kind of material is very unstable in the air, and the larger size rare earth neodymium magnet is usually protected by electroplating or epoxy electrophoretic paint.

Neodymium strong rare earth magnet with the coating is generally nickel, zinc, epoxy resin, etc. The color of NdFeB magnet surface will be different with different electroplating.

The name of black neodymium(NdFeB) magnets comes from the coating of magnets. The surface of black rare earth neodymium(NdFeB) magnets are usually coated with epoxy. The epoxy coated rare earth neodymium magnets you get from Beilun Meank are with at least 3 layers(Nickel-Copper-Epoxy).

Two Processes of Rare Earth Neodymium Magnets with Epoxy Coated

One of the production principles for neodymium rare earth magnet with the epoxy coating is electrophoresis, which usually adopts the method of hanging plating, so there will be two small spots on the surface of the magnet to see the color of the bottom layer.

Another way for epoxy coated neodymium(NdFeB) rare earth magnets is spraying, by using spraying to make black epoxy coated rare earth neodymium NdFeB magnets, the surface of rare earth NdFeB magnets can be fully coated, but the coating is easy to fall off.

All Available Surface Treatments for the Small Black Round Neodymium Magnets

Surface	Coating	Thickness (Microns)	Color	Resistance
Passivation		1	Silver Grey	Temporary Protection
Nickel	Ni+Ni	10-20	Bright Silver	Excellent Against Humidity
Nickel	Ni+Cu+Ni	10-20	Bright Silver	Good Against Salt Spray
Zinc	Zn	8-20	Bright Blue	Excellent Against Salt Spray
Zinc	C-Zn	8-20	Shinny Color	Superior Against Humidity
Tin	Ni+Cu+Sn	15-20	Silver	Superior Against Humidity
Silver	Ni+Cu+Ag	10-20	Silver	Superior Against Humidity
Gold	Ni+Cu+Au	10-20	Gold	Temporary Protection
Copper	Ni+Cu	10-20	Gold	Excellent Against Humidity&Salt Spray
Epoxy	Epoxy	15-25	Black, Red, Grey	Excellent Against Humidity, Salt Spray, Superior Against Solvents, Gases, Fungi and Bacteria, FDA Approved
	Ni+Cu+Epoxy			Excellent Against Humidity
	Zn+Epoxy			Resistance
Parylene	Parylene	5-20	Grey	Excellent Against Humidity
Chemical	Ni	10-20	Silver Grey	Excellent Against Humidity

Characteristics of Black Neodymium Magnets

High Magnetic Energy: Offers stronger adhesion than regular magnets.

Hard and Durable: High hardness ensures long-lasting use without easy scratching or damage.

Water and Corrosion Resistant: Withstands moisture, rust-free, and exhibits corrosion resistance.

Stable Color: Elegant black color, resistant to fading.

Applications of Epoxy Coated Rare Earth Neodymium Magnets

In daily life, it's used for magnetic items like knife racks, keychains, and bookmarks. In industries, it's essential for making motors, generators, magnets, electromagnetic valves, sensors, and electronic products like disk drives.