Nd-Fe-B粉末合金的多层电镀防护技术  

Preservation Technique of Nd-Fe-B Powder Alloy Parts

作　　者：谢原寿[1] 柳全丰[1] 单强虹 

机构地区：[1]湘潭大学化工学院,411105

出　　处：《材料保护》1998年第6期6-8,共3页Materials Protection

摘　　要：用化学镀方法在Nd-Fe-B粉末合金多孔基体上施镀铜-镍合金或镍-磷合金底层，再电镀高硫镍和半光亮镍。研究了几类镀层对基体的封闭能力、耐蚀性，用恒电流阳极溶解法测定了多层体系的电位-时间曲线,并进行了镀层组织的金相检测。结果表明，化学镀Ni-P合金镀层对Nd-Fe-B基体有良好的封闭性能，高硫镍层的电位低于电镀半光亮Ni和Cu-Ni、Ni-P化学镀层，腐蚀可控制在高硫镍层中横向进行，Cu-Ni／Ni-P／高硫Ni／半光亮Ni体系和Ni-P／高硫Ni／半光亮Ni体系有极佳的防护性能。The multicoating System for Nb-Fe-B powder alloy parts was studied. The Cu-Ni or Ni-P alloy layer produced by electroless plating was used as underlying layer, and then the high sulphur nickel and semibright nickel coatings were electrodeposited. The results showed that the electroless Ni-P coating had good sealing performance for Nb-Fe-B alloy substrate and the potential of high sulphur nickel layer was negative to semi-brigh nickel and Cu-Ni and Ni-P layers.

关 键 词：磁性材料 电镀 粉末合金 镀镍 钕铁硼合金 

分 类 号：TF125.8[冶金工程—粉末冶金] TQ153.12[冶金工程—冶金物理化学]