Causes and avoidance of rust spots on NdFeB magnets

- Nov 19, 2019-

After a period of time, the neodymium iron boron strong magnet will appear white or other color spots on the surface, and it will become rust spots when it develops slowly. Under normal circumstances, the plating of the electromagnet is not easy to appear rust spots, and the rust spots usually have the following conditions. :


1. The magnet is stored in a place with humidity, poor air circulation, and temperature difference;


2. The dirt on the surface of the magnet before plating is not well cleaned;


3. Insufficient time for plating or process flow problems;


4. Magnet oxidation caused by damage to the packaging seal of the magnet;


NdFeB magnets are qualified for electroplating products. Under normal conditions, there should be no rust on the surface of the electroplated coating. NdFeB magnets should avoid the following storage methods:


Disc magnet N50 9mm x 2mm Neodymium Disc Magnets Cylinder Magnets


In places that are too humid and have poor air circulation; when the temperature difference changes greatly, even if the salt spray test product is stored in a harsh environment for a long time, rust spots may occur. When the electroplating product is stored in a harsh environment, the base layer further reacts with the condensed water, which causes the adhesion between the base layer and the plating layer to decrease, and in the severe case, the base layer is partially pulverized, thereby naturally peeling. Electroplated products should not be placed in high humidity for long periods of time and should be placed in a cool, dry place.