What are the common coatings of strong magnets

What are the common coatings for strong magnets? The composition of magnets is iron, cobalt, nickel and other atoms, the internal structure of its atoms is relatively special, and it has a magnetic moment itself. Magnets can generate magnetic fields and have the property of attracting ferromagnetic substances such as iron, nickel, cobalt and other metals. Today, Xiaobian will introduce to you the common coating of magnets.

Galvanized: the surface looks silvery white, can be used for 12-48 hours of salt spray, can be used for bonding with some glues, (such as AB glue) if it is plated well, it can be stored for two to five years. .

Black zinc plating: according to customer requirements, the surface of the product is treated to black. In the electroplating process, a black protective film is added through chemical treatment on the basis of galvanizing. This film can also protect the product. Increase the salt spray time and prolong the oxidation time. However, the surface is easily scratched and loses its protective effect.

Nickel plating: It looks like stainless steel, the surface is difficult to be oxidized in the air, and the appearance is good, the gloss is good, and the electroplating can pass the salt spray test for 12-72 hours. The disadvantage is that it cannot be used with some glues, which will cause the coating to fall off and accelerate the oxidation. Now most of the nickel-copper-nickel on the market are used. This kind of electroplating method does 120-200 hours of salt spray, but its electroplating cost is relatively high. .

Gold-plated and silver-plated: mostly used for magnetic jewelry, magnetic jewelry is mostly golden yellow and silver white. Gold-plated magnets look as beautiful as gold and are generally used in the jewelry industry. Our products can also be gold-plated for magnetic jewelry.

Epoxy plating: The magnet is nickel-plated and then a layer of resin paint is added on the outside. Its biggest advantage is that it can prolong the time of the salt spray test.

Chrome plating: Chrome plating is generally rare, and it is believed that its chrome plating process has strong corrosion resistance and is difficult to react with other substances. Generally used in relatively harsh working environment with strong pH. The cost of electroplating is very high, and the general company cannot accept it, so few people choose it.

The above is the introduction of common coating of magnets, I hope it can be helpful to everyone. Today I will tell you all about it, see you next time.