Sintered NdFeB magnets are widely used in various industries in the current era of rapid development. They are easy to oxidize and require a protective layer. It is called electroplating or surface treatment. Because of the elements in NdFeB permanent magnets Both Nd and Fe are relatively easy to corrode and oxidize, making the sintered NdFeB permanent magnets have poor corrosion and oxidation resistance. Therefore, how to improve their oxidation and corrosion resistance and protecting their surface has become an important issue in production and use. Surface anti-corrosion technology is usually used to reduce the oxidation and corrosion of NdFeB permanent magnets. Commonly used coatings are zinc, nickel copper-nickel, black nickel, perylene, gold, silver, and epoxy resin, but the most commonly used coatings are zinc and nickel-plated copper-nickel coatings.
What is the difference between zinc-plated and nickel-plated NdFeB magnets?
1. The difference in polishing:
As the polishability of nickel plating is superior to that of zinc, the appearance is brighter.
2. The difference in anti-rust ability:
Zinc plating is general, nickel plating is good, chrome plating is the best.
The method of electroplating is mainly determined by the environment in which the magnet is used. If the environment is high, it is recommended to use nickel plating. The price of nickel is more expensive than that of zinc, and zinc is also superior to nickel in price.
3. Performance difference:
After the treatment of the nickel-plated surface, the temperature resistance has also been improved a lot, coupled with its own conductive properties.
4. Difference in hardness:
Nickel plating has high hardness. In general use, it can greatly avoid collisions and corners.
5. The price difference:
Zinc has advantages, and the price ranges from low to high for zinc plating, nickel plating, and chromium plating. The difference in materials and labor determines the price. Conventional zinc and nickel are barrel plating, and chromium is rack plating. Nickel: The method of plating a layer of nickel on metal or certain non-metals by electrolysis or chemical methods is called nickel plating.
