Neodymium-iron-boron magnetic material is made by mixing, pressing and sintering the ultrafine powders of neodymium, iron and boron after screening. It is machined into different shapes according to the requirements of product use. Since the chemical properties of this material are relatively active and it is easily oxidized, its finished product needs to be electroplated and coated. However, the quality of electroplating coating is closely related to its pre-treatment. This pre-treatment process generally includes degreasing, rust removal, activation and other processes. If one link of this pre-treatment process is not handled cleanly, it will bring latent defects to the final electroplated product, causing blistering and peeling of the electroplating layer. Defective magnetic material parts will lose their market sales value and be scrapped. If magnetic material parts with hidden defects are used on equipment, they may cause the whole machine to fail due to the use of such unqualified parts. Even serious consequences.
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