How to prevent corrosion of neodymium iron boron magnets
Neodymium iron boron magnets are very easy to be corroded. Therefore, most of the finished products are to be electroplating or coating. The conventional surface treatment used include: nickel (nickel copper nickel, zinc, aluminum), electrophoresis. If work in a confined environment can also be used in the way of phosphating.
Neodymium iron boron magnets are widely used and developed rapidly. Neodymium iron boron from the invention to the now widely used, but also for more than 20 years. Because of its high magnetic performance and ease of processing, the price is not very high, so the application domain expands rapidly. At present, the commercialization of NdFeB, BHmax can reach 50MGOe, 10 times of ferrite.
NdFeB also belongs to the powder metallurgy products, processing methods and SmCo similar. At present, the highest working temperature of the neodymium iron boron is about 180 degrees Celsius. If it is a bad environment application, the general recommendation is no more than 140 degrees celsius.
Neodymium iron boron magnet features: and usually with ferrite permanent magnet compared, neodymium iron boron magnet has a very excellent magnetic properties. The magnetic energy product is much higher than other types of magnets, can be called "a generation of magnetic king". Neodymium iron boron magnets have very high saturation magnetization BS Bs=16KGs and magneto crystalline anisotropy field ha HA=73KOe, neodymium iron boron magnet products widely used in packaging, toys, gifts crafts, magnetic bike, motor, micro motor, computer, instrument, meter, friction support vehicles, cameras, watches and clocks, audio, home appliances, office automation, magnetotherapy and daily life in various fields.
Due to the high magnetic properties of Nd Fe B, in many occasions, magnetic materials are used to replace other magnetic materials, which are used to reduce the volume of the product. If you use ferrite magnets, and now the size of the phone, I'm afraid it is not less than half a brick.