发明名称 |
Surface treatment for iron-based permanent magnet including rare-earth element |
摘要 |
A magnetically anisotropic magnet substrate is coated with at least one layer of nickel plating followed by a chromate layer. The chromate top layer improves the corrosion resistance of the coated magnet substrate. In a preferred embodiment, the layer of nickel plating includes a first layer of a non-bright nickel plating followed by a second layer of a semi-bright nickel plating. One embodiment adds a copper under-layer below the nickel plating.
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申请公布号 |
US5332488(A) |
申请公布日期 |
1994.07.26 |
申请号 |
US19930024519 |
申请日期 |
1993.03.01 |
申请人 |
HITACHI MAGNETICS CORPORATION |
发明人 |
MITSUJI, KATSUO |
分类号 |
C25D5/14;C25D5/34;C25D5/48;H01F1/059;H01F41/02;(IPC1-7):C25D5/00 |
主分类号 |
C25D5/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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