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Ndfeb magnet and alnico magnets how to distinguish? _ ndfeb strong magnet manufacturers

by:Newland     2020-04-02
Ndfeb magnets and alnico magnets are common magnetic materials, how to distinguish ndfeb and alnico? A, exterior appearance is judgment, ndfeb and alnico, the simplest method. Ndfeb due to containing metal neodymium oxide, need surface plating. Ndfeb is usually more plating nickel and zinc. Aluminum nickel and cobalt has good corrosion resistance, surface treatments don't usually. Second, the material of two kinds of fracture of the products is not the same. Ndfeb is a very fine small crystals, and aluminum nickel and cobalt section will show more rough, the crystal grain is bigger. Three, the curve of detector by demagnetization curve judge this two kinds of magnetic materials, ndfeb remanence is higher.
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