Q: How long does it take for the magnetism to lose its strength?
Neodymium magnets do not lose strength unless damaged or exposed to unfavourable conditions for long periods. Short periods of exposure to temperatures over 80℃ may cause a temporary loss of magnetic strength to Neodymium magnets but in many cases, the loss will be recovered. Most Neodymium magnetic products will remain effective for many years under normal conditions but the impact of continuous or repeated exposure to heat, collision, breakage or corrosive forces will slowly take its toll, reducing the effectiveness of the magnetic field.
In applications where temperatures may exceed 80℃, it may be necessary to consider using special high temperature rated Neodymium magnets. Also consider Ferrite based magnets which although having their own limitations in terms of their naturally low mechanical strength and reduced magnetic power. are able to withstand temperatures up to 250-300℃, Alnico magnets or Samarium Cobalt magnets should also be considered for either their corrosion or temperature resistant properties.