Ferrite, also called permanent magnet ferrite, its chemical name is iron tetroxide. It is already an oxide of iron. It is difficult to be oxidized again. For the magnetic ring, its characteristics are long-term and there will be no problem at all. Deterioration is just that after being stored for a long time, some powder will remain on the surface. This is a normal phenomenon and does not affect its characteristics.
As we all know, ferrite magnets are made of a variety of magnetic materials. Naturally, if left for a long time, powder will appear on them, which is what our industry calls oxidation. However, this will not affect its magnetic properties and Anti-resistance, the magnetic ring will be easily oxidized once it encounters moisture, especially in humid weather. If the packaging magnetic ring is not sealed well, moisture will run into the carton, which will also cause the magnetic ring to oxidize.
Many people ask, isn't the surface of the ferrite magnets washed with clean water? Why are you still afraid of water? Of course, the ferrite magnets uses water to wash away the dirt on the surface, but after cleaning, the ferrite magnets needs to enter the oven to supply dry moisture. , so the newly made ferrite magnetswill not oxidize at all, and the surface of the newly washed magnetic ring has a bright luster!
In order to protect ferrite magnets from the effects of oxidation, a common method is to apply a surface coating, such as plating or coating, to prevent oxygen contact. In addition, the magnets can also be encapsulated using sealing packaging materials to reduce oxygen and Intrusion of moisture.