Passivation treatment of NdFeB magnets

2024-06-05 23:56

In order to improve the corrosion resistance of NdFeB magnets, surface treatment is usually required. Common surface treatment methods for NdFeB magnets include phosphating, electroplating, electrophoresis, vapor deposition, etc. The passivation of neodymium magnets is to form a protective film on the surface of neodymium magnets by chemical methods to achieve the purpose of corrosion prevention. The passivation process of NdFeB magnets generally includes: degreasing → water washing → ultrasonic water washing → acid washing → water washing → ultrasonic water washing → pure water washing → passivation treatment → pure water washing → dehydration → drying. 1. Degreasing can only remove grease, dust, sweat stains and attached metal chips on the surface of NdFeB magnets, but cannot remove rust on the magnets. The oil stains on the surface of NdFeB magnets are brought in during the material processing process, such as the anti-rust grease used during storage and transportation to prevent rust. Before further sur

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