The eleventh process of magnet production process: electroplating

Because a large proportion of NdFeB is composed of iron, NdFeB is very easy to oxidize when exposed to air or humid environment. Magnet electroplating is an important work to beautify the appearance of magnets and increase the storage time of magnets.

The surface treatment of the magnet mainly includes zinc, black zinc, nickel, copper, gold, silver, epoxy resin, etc. Surface plating is different, its color is not different, the preservation time is not the same, each has its advantages and disadvantages.

How to make one.) Zinc: The surface is silvery white and can pass12-48Hours of salt spray can be used with some glue (e. g.ABGlue), if the electroplating effect is good, it can be stored for two to five years, and the electroplating cost is relatively low.

It was Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko Ko) Nickel: The appearance looks like the color of stainless steel, the surface is not easy to oxidize when left in the air, the appearance is good, the gloss is good, and it can pass12-72Hour salt spray test. The disadvantage is that it is not easy to use glue for bonding, the surface is smooth and the adhesion is not tight, and it is easy to make the coating fall off. Accelerate oxidation, now on the market for nickel-Copper-Nickel plating this way to do24-96hours of salt spray.

Kan 3.) Black zinc: The surface of the magnet is processed into black according to the customer's customized requirements. A black protective film is added to the zinc plating through chemical treatment. This film can also protect the magnet and increase the salt spray time. However, its surface is easily scratched and loses its protective effect.4) Black nickel: The same as the demand for black zinc plating, a black protective film is added to the nickel plating through chemical treatment.

The coming of 4.) Gold: Commonly used in jewelry magnet accessories, there are now many very popular magnetic jewelry.

The Kan 5.) Epoxy resin: In order to increase the salt spray resistance time of the product, a layer of resin paint is added to the outside of the magnet after the nickel plating of the product, mostly black, which is the best corrosion-resistant coating outside the magnet coating.

Source: magnet manufacturers Youlian Magnetic Industrywww.youliancy.com