It is not recommended to use the magnet without a protective layer. A triple layer plating of
NickelCopperNickel (NiCuNi) is the standard coating. Unless requested otherwise, this NiCuNi
coating is always applied to the magnets.
However, the level of protection given by any coating depends on the environment the magnet
will be subjected to and how the coating is looked after. If the coating is scratched or broken,
it will not offer protection from moisture.
The coating thickness of NiCuNi is above 12um,the test always done for it is 24h salt spray
test and 72h PCT.The max working temperature is 200℃.Some client will also choose to use
only Ni+Cu or only double Ni.