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Available Coatings for Neodymium Magnets


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    Neodymium magnet( also known as NdFeB magnet) is the most commonly used rare earth magnet. NdFeB magnets are widely used in electronic and motor products. In order to avoid corrosion damage, it is necessary to protect the surface of neodymium magnets, Nickel-coated neodymium magnets,Zinc-coated neodymium magnets and Epoxy coated neodymium magnets are most common used.There are also other coatings suitable for neodymium magnets.

    The following table describes the coating suitable for NdFeB magnets.


    Surface

    Coating

    Thickness (Microns)

    Color

    Resistance

    Passivation


    1

    Silver Grey

    Temporary Protection

    Nickel

    Ni+Ni

    10-20

    Bright Silver

    Excellent Against Humidity

    Ni+Cu+Ni

    Zinc

    Zn

    8-20

    Bright Blue

    Good Against Salt Spray

    C-Zn

    Shinny Color

    Excellent Against Salt Spray

    Tin

    Ni+Cu+Sn

    15-20

    Silver

    Superior Against Humidity

    Silver

    Ni+Cu+Ag

    10-20

    Silver

    Superior Against Humidity

    Gold

    Ni+Cu+Au

    10-20

    Gold

    Superior Against Humidity

    Copper

    Ni+Cu

    10-20

    Gold

    Temporary Protection

    Epoxy

    Epoxy

    15-25

    Black,Red,Grey

    Excellent Against Humidity&Salt Spray

    Ni+Cu+Epoxy

    Zn+Epoxy

    Parylene

    Parylene

    5-20

    Grey

    Excellent Against Humidity,Salt Spray,Superior Against Solvents,Gases, Fungi and Bacteria,FDA Approved

    Chemical

    Ni

    10-20

    Silver Grey

    Excellent Against Humidity




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