钕铁硼磁体的有机溶液电镀铝研究

Electroplating Aluminum onto NdFeB Magnet from Organic Solution

对钕铁硼磁体自 Al Cl3+L i Al H4的四氢呋喃 -苯溶液中电镀铝进行了研究 ,结果表明 :在电流密度为 1～ 5 A/ dm2时得到的镀层最为致密均匀 ;当电流密度为 10 A/ dm2时 ,电镀速度可达到 72 μm/ h;镀铝磁体在 3.0 %氯化钠溶液中的耐腐蚀性能优于电镀镍、锌磁体 ,经阳极氧化和铬酸盐处理后 ,性能进一步提高 ;有机溶液电镀铝方法是钕铁硼磁体有效的防腐蚀手段。

Electroplating aluminium onto NdFeB magnets from organic solution of aluminium chloride and lithium aluminium hydride in tetrahydrofuran benzene solvent is studied The best deposits can be obtained at current densities of 1～5A/dm 2 The electroplating rates are 72μm/h at current densities of 10A/dm 2 The corrosion resistance of the Al electroplated magnets in 3% NaCl solutions is much better than Ni, Zn electroplated, and highly enforced by anodic oxidation and chromate treatment The results prove that electroplating aluminum protective deposits from organic solutions is effective for NdFeB magnets