Common coatings of China neodymium block magnets
The coating treatment of China neodymium block magnets is mainly aimed at the special working environment of magnets. For example, the working environment of motor magnets and iron remover magnets is relatively humid, so surface coating treatment is required.
The coating treatment of China neodymium block magnets is mainly aimed at the special working environment of magnets. For example, the working environment of motor magnets and iron remover magnets is relatively humid, so surface coating treatment is required. At present, the main coating technologies of China neodymium block magnets are: zinc plating, color zinc plating, nickel plating, black nickel plating, nickel plating copper nickel, gold plating, silver plating, epoxy plating.
The coating treatment on the surface of China neodymium block magnets, according to the use characteristics of the product and the storage time, can be carried out in different electroplating processes. The most common electroplating processes are zinc plating and nickel plating. The surface color of each plating layer is different. Each has its own advantages and disadvantages.
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 coating: China neodymium block magnets are nickel-plated and then add a layer of resin paint on the outside. The biggest advantage is that it can prolong the time of 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.
Tongli Magnetic Industry Co., Ltd.
Address: No. 5, Changfu Road, Ludong community, Humen Town, Dongguan City, Guangdong Province
Contact: Lucid
Tel: +86-769-82882585 +86-18028919951
E-mail: lucid@tlmagnet.com
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