♦ Why should neodymium magnets be coated?
   The ingredients of neodymium magnets are Neodymium, Iron and Boron,which are short for neodymium or Nd-Fe-B. these metals are easily oxidated.When the magnets are exposed to air,the Iron in neodymium magnets can be rusted quickly and the magnets will be ruined.So how can we protect magnets from corrosion? Nickel, Zinc, Epoxy, Gold and Silver are used to cover the surface of the neodymium magnets.
   The coating does not affect the performance of magnets. what kind of coating is used to cover the magnets, it all depends on the users' application.Nickel has a shiny silver and have good quality to protect the magnets.Epoxy is a popular plastic coating which is 100% corrosion sesistant. it is used to cover the magnets which are made for toys. Gold plating is applied over nickel. however the cost is much higher than nickel.
   ♦ Do neodymium magnets pose a safety hazard?
    If handle magnets in wrong way and careless, neodymium magnets will be not safe good, some articles in www.rscmagnet.com news section mentions about this.
   ♦ What are grades for neodymium magnets?
    When you see neodymium magnets classified as N35~N52, N33H~N50H,...N28UH~N38UH, Have you ever think about the meaing of these? The number after N represents the grade of magnets. the bigger the number is, the stronger magnetism the magnets have. If the magnet's grade is N38UH, the 38 depicts the strength of the magnet, and UH shows the highes working temprature the magnets can stand.
    ♦ How are neodymium magnets made?
    The ingredients: Neodymium, Iron, Boron are powerded and mixed then pressed into molds under a very great pressure. the material then undergoes the sintering process to heat in a vacuum. when it is cooled and then cut into shapes, and if the coating is necessary, they will be covered with special coating.

                                      

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