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Surface protection of permanent magnets made from NdFeB
(IBS material - NeoDeltaMagnet)
The following coating options are available as surface protection for permanent magnets made from NdFeB (NeoDeltaMagnet).

Surface material

Coating thickness
required

Usage
temperature

Surface
hardness

Features
Galv. tin (Sn) > 15 µm > 15 µm soft Very good resistance in a humid environment. The soft surface also protects against mech. effects.
Galv. zinc (Zn) > 10 µm > 10 µm medium Good resistance in a humid environment.
Galv. nickel (Ni) 10 - 15 µm < 200° C very hard Very good resistance in a humid environment. WIth small magnets, loss of magnetic flux due to magnet. short- circuit of approx. 5%.
Galv. tin on nickel (Ni + Sn) Ni > 5 µm
+
Sn > 10 µm		 < 150° C soft Excellent resistance in a humid environment. Suitable for clean rooms.
Galv. gold on nickel (Ni + Au) Ni 10 - 15 µm
+
Au > 1 µm		 < 200° C medium Excellent resistance in a humid environment. Suitable for clean rooms.
Parylene polymer coating 0.1 - 50 µm < 220° C soft Pore-free, even including on the edges. Clear film. Maximum corrosion protection including against saltwater.
 

Plastic-coated NdFeB magnets (IBS material - NeoAlphaMagnet) can be given an epoxy resin deposit coating. The coating thickness is 10 - 20 µm. The colour is pale grey or black. This surface coating has good friction resistance and is resistant in a humid environment, to weak acids and to alkaline media, and especially to salt solutions. Usage temperature approx. + 100° C.

As a new innovation we are now able to to manufacture magnets to customer dimensions made from a NdFeB material with high corrosion resistance.

Our standard magnets made from NdFeB (NeoDeltaMagnet) are all supplied with a galvanic surface protective coating (tin on nickel).
 
 
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