Neodymium-iron-boron magnets are quite prone to corrosion, and most finished products need electroplating or painting. Conventional surface treatments include nickel plating (nickel-copper-nickel), zinc plating, aluminum plating, electrophoresis, etc. Phosphating can also be used if they work in a closed environment.
Then, how can corrosion be avoided? Now, let's have Dowell introduce the anti-corrosion methods to you:
NdFeB is a magnetic product that is widely used and developing rapidly at present. Since its creation, neodymium-iron-boron has been widely used, but its application time does not exceed 20 years. Due to its high magnetic properties and easy processability and relatively low price, its application fields are expanding rapidly. Currently, the magnetic energy product of commercialized neodymium-iron-boron can reach 50 megagauss-oersteds, which is ten times that of ferrite.
Compared with other permanent magnetic materials such as ferrite, neodymium-iron-boron has excellent magnetic properties. Its magnetic energy product is much higher than that of other types of magnets, so it can be called the "King of Magnets of the First Generation". Neodymium-iron-boron has a very high saturation magnetization intensity BS (BS = 16 kilogauss) and a magnetic crystal anisotropy field HA (HA = 73 kilo-oersteds). Neodymium magnet products are widely used in various fields such as packaging, toys, gifts and handicrafts, fitness magnetic control vehicles, motors, micro-motors, computers, instruments, meters, motorcycles, cameras, clocks, acoustics, household appliances, office automation, magnetotherapy and daily life.
Neodymium-iron-boron also belongs to powder metallurgy products, and its processing method is similar to that of samarium-cobalt. Currently, the operating temperature of neodymium-iron-boron is about 180 degrees Celsius. In the case of severe environmental applications, it is usually recommended not to exceed 140 degrees Celsius.
These are the neodymium-iron-boron anti-corrosion technologies we have introduced in detail. Due to its high magnetic properties, neodymium-iron-boron is used to replace other magnetic materials in many occasions to reduce the volume of products.
