Normally, the surface of neodymium cube magnets has an electroplated layer and does not rust. Rust spots will occur at this time because it is in a relatively high humidity environment and the air circulation in the working environment is very poor, so rust spots usually appear. The neodymium iron boron magnet should be placed in a place with good ventilation, rather than a place with large temperature changes.
In addition, the lack of electroplating time and poor electroplating of neodymium cube magnets manufacturers are also one of the reasons. This is a process problem. In addition, if the seals of neodymium cube magnets are damaged, the strong magnets will also be oxidized, causing rust spots. Another point is that before electroplating, the dirt on the surface of neodymium cube magnets cannot be removed well, which is also one of the reasons for rust spots.
Grounded neodymium cube magnets will rust. The way to prevent rust is to avoid exposing the surface to water and air. You can put them in water, or they can be dried and sealed immediately. After it is ground, it is recommended to use an ultrasonic dryer to dry it immediately to reduce rust.
The following storage methods should be avoided for neodymium cube magnets: In places with excessive humidity and poor air circulation. When the temperature difference changes greatly, even if the products that have passed the salt spray test are stored in a harsh environment for a long time, rust spots may appear.