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  • Q: How long can the magnetic properties of rare earth neodymium magnets be kept?

    A: The magnetic properties of rare earth neodymium magnets can be kept permanently without a strong external magnetic field, appropriate temperature and humidity and vibration.

  • Q: What factors can affect the processing cost of magnets?

    A: Shape, tolerance and quantity are the main factors affecting the price of magnets. The tighter the tolerance, the higher the processing cost. The smaller the quantity, the higher the processing cost. The more complex the shape of the magnet, the higher the processing cost.

  • Q: Can you provide waterproof magnets?

    A: Yes, we are a professional manufacturer of waterproof magnets. We have all kinds of waterproof magnets for sale,which including plastic coated magnets, rubber coated magnets and Teflon coated magnets.

  • Q: Do samarium cobalt magnets need electroplating?

    A: Compared with NdFeB magnets, samarium cobalt magnets have relatively low iron content, so samarium cobalt magnets are not easy to corrode. If samarium cobalt magnets are put into seawater, some rust will be generated on the surface, but it will not affect the use. Therefore, samarium cobalt magnets usually do not need electroplating.

  • Q: How to check the quality of neodymium magnet coating?

    A:  The coating quality directly affects the service life of neodymium magnets. The main methods to check the coating quality of neodymium magnets are as follows:

    1. Appearance

    The appearance is mainly observed with the naked eye, preferably under natural light (sunlight, non-direct), or under the illumination equivalent to a 40W fluorescent lamp. There shall be no blistering, peeling, local electroplating, uneven colour, stains, water stains, etc.

    2. Measure the thickness of neodymium magnet coating.

    3. Drop test, mainly used for galvanized neodymium magnets.

    4. Cross-cutting test, mainly used for neodymium magnets with nickel coated.

    5. Quenching and thermal shock test.

    6. PCT pressure test.

    7. SST salt spray test.

    8. Constant temperature and humidity test, etc.


  • Q: How to choose magnets?

    A:  Magnets are mainly selected from the following aspects:

    The function of the magnet, you must know what function the magnet needs?

    The shape of magnet: round magnet, rod magnet, square magnet, arc magnet and cone magnet.

    Dimensions of magnet: length, width, height, diameter and tolerance.


  • Q: Can neodymium magnets be used directly for magnet fishing?

    A: Neodymium magnets can be directly used for fishing, but it is easy to break and damage due to impact. It is best to use a special fishing magnet for underwater fishing.

  • Q: How to measure the strength of a magnet?

    A: The magnetic field density on the surface of a magnet, called the surface Gauss, is measured with a Gauss meter. A tensile tester is used to test the holding force of a magnet.