China permanent magnet manufacturer:

How to select the coating of NdFeB powerful magnet

The most commonly used coatings of NdFeB powerful magnets are zinc plating and nickel plating, which are gold and silver. Although many friends know that magnets need electroplating, they don’t know the difference between different coatings. In fact, there are obvious differences between zinc plating and nickel plating on NdFeB magnets in appearance, rust prevention and service life.

How to select the coating of NdFeB powerful magnet?

1Differential polishing of NdFeB coating
Nickel plating is superior to zinc plating in polishing and is brighter in appearance. Nickel plating is generally used for products with high appearance requirements. Export products are basically nickel plated. And some magnets are not exposed, the appearance of the product requirements are relatively low, generally do galvanizing.
2Difference of antirust properties of Nd-Fe-B coating
After the surface treatment of nickel plating, its corrosion resistance is higher, up to 96h salt spray without rust, while zinc plating can only achieve 48h salt spray without rust.
3Hardness difference of NdFeB coating
Nickel plating is also higher than zinc plating. In the process of use, collision can be avoided to a great extent, which makes the NdFeB strong magnet drop angle and break.
4Difference of service life of NdFeB coating
Compared with nickel plating, due to the different surface coating and corrosion resistance, the service life of zinc plating is lower than that of nickel plating. The main performance is that the surface coating is easy to fall off after a long time, which leads to the oxidation of the magnet and affects the magnetic force.
5. Price difference of NdFeB coating
In this regard, zinc plating is a great advantage, the price from low to high ranked for zinc plating, nickel plating, epoxy resin, etc. The quality of materials and artificial differences are also decisive factors. Conventional zinc plating and nickel plating is barrel plating. Nickel plating is a method of plating a layer of nickel on metal or some non-metal by electrolysis or chemical method, so it is called nickel plating.

Neodymium iron boron strong magnet electroplating, is to add a protective layer on the surface, play a beautiful, anti-corrosion, rust, increase the surface strength, prolong the service life and so on. You can choose the right coating according to your own needs and choose the magnet products with high cost performance. The right one is excellent.

Source: China Permanent Magnet Manufacturer



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