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Fe-Nd-B磁体的涂层不仅可用来抗腐蚀溶剂和高湿度,而且可使磁体表面光滑无疏松磁性颗粒。无论金属(Sn、Ni、AI)涂层还是有机涂层部可以在磁体表面产生耐腐蚀和表面光滑的外层。但最基本的要求是避免在涂层工艺中发生氧脆。为了比较不同涂层的性能及涂覆工艺,被涂覆磁体在常用标准、国际标准或用户试验条件下进行试验。耐蚀试验结果表明:影响涂层质量高低的主要因素是涂覆工艺,而不是涂层物质本身。高质量涂覆工艺,可产生高致密、无缺陷的涂层
Fe-Nd-B magnet coating can not only be used to resist solvents and high humidity, but also make the magnet surface smooth without loose magnetic particles. Regardless of the metal (Sn, Ni, Al) coating or the organic coating portion, a corrosion-resistant and smooth-surfaced outer layer can be produced on the surface of the magnet. But the most basic requirement is to avoid the occurrence of oxygen embrittlement in the coating process. In order to compare the performance of different coatings and the coating process, the coated magnets are tested under common standard, international standard or user test conditions. Corrosion test results show that: the main factor affecting the quality of the coating is the coating process, rather than the coating itself. High-quality coating process produces high-density, defect-free coatings