Ndfeb strong magnet contains a lot of iron, so its corrosion resistance is poor, easy to rust in contact with air. So generally in the ndFeb strong magnet surface for phosphating treatment, namely electroplating.
What kind of coating effect is good for Ndfeb strong magnet? First should know what ndFeb coating can do.
Common coatings of NdFeb strong magnet include nickel, zinc, chromium, black zinc, black nickel, blue and white zinc, gold, silver, epoxy resin and so on. The different types of electroplating make the surface of the magnet different in color, and the length of preservation is also different.
Through comparative study, the effect of coating of nickel, zinc and epoxy resin on magnetism of NdFeb magnet in three kinds of solution shows that epoxy resin and nickel coating of polymer material have very good protection effect on magnet in acid, alkali and salt environment, and zinc coating is better. However, due to the complexity of epoxy resin process and the high cost, in most cases, nickel coating can be used to get good results. For products with strict performance and appearance requirements, nickel coating is a good choice. There are no very demanding products directly with zinc coating is OK. Choose what coating, mainly according to the use of the product environment to choose, the appropriate is the best!
