Sintered NdFeB magnets

• General Descriptions
• Pictures of Sintered NdFeB Magnets
• Standard Shapes of NdFeB Magnets
• Magnetization Direction
• Demagnetization curves of sintered NdFeB magnets
• Workshop View
• Surface Treatment
• Flow Chart of Sintered NdFeB magnets

Surface Treatment of Sintered NdFeB magnets

The sintered neodymium-iron-boron permanent magnetic material is a chemically active powder metallurgical material, which is characteristic of being hard and brittle easy oxidization and erosion. Based on its features, the most effective way is to apply surface plating or coating. As on the surface of neodymium-iron-boron magnetic material, empty holes or oxidization phase occurred by machining may exist. The surface treatment should undergo pre-treatment procedure and have appropriate plating. The process of treatment is as follows:

chamfer → polishing → lubricant removal → acid cleaning → ultrasonic cleaning → plating → plating inspection

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