粘接钕铁硼磁体的表面性质及物理性质与一般金属有较大差别,其电泳工艺与常规电泳工艺也有较大差别.研究了粘接钕铁硼磁体的阴极电泳涂装工艺,主要是电泳电压、电泳时间、电泳温度以及涂层固化工艺对涂层性能的影响.用盐雾试验、湿热试验以及盐水浸泡试验评价了漆膜的耐腐蚀性能.研究表明:选用好的电泳涂料,采用封孔工艺能有效降低磁体孔隙率;电泳电压采用初始电压80～90 V,沉积电压140～160 V,电泳温度控制在28～30℃,电泳时间为150～180 s,烘烤工艺采用先70～80℃烘20～30 min,再170℃烘烤20 min,可以获得高耐蚀性能的防腐蚀涂层.涂层耐盐雾400h以上,耐湿热1 200h以上,耐盐水浸泡120 h以上.
参考文献
| [1] | Xiao J;Joshua O .Polymer-bond magnets[J].Journal of Alloys and Compounds,2000,309(05):100-106. |
| [2] | Tattam C;Williams A J .The corrosion behaviour of uncoated bonded Nd-Fe-B magnets in humid environments[J].Journal of Magnetism and Magnetic Materials,1996,152(03):275-278. |
| [3] | Gaolin Yan;A.J.Williams .The effect of density on the corrosion of NdFeB magnets[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1999(1/2):266-274. |
| [4] | 杨建红,周向明,李庆余.国内外NdFeB永磁材料防腐进展[J].材料导报,2000(01):28-29. |
| [5] | Yoshimura .Process for sealing pores in molded product and bonded magnet with pores sealed by the process[P].US 6423369,2002-04-03. |
| [6] | Yoshimura T .Method for plating bond magnet[P].JP 2003100536,2003-03-05. |
| [7] | Youshimra M .Sealing method of cavity part of molding,and bond magnet sealed by the method[P].JP 2002088402,2002-02-08. |
| [8] | Nikos V .A new electrocoating technique to avoid cratering and increase voltage rupture[J].Progress in Coatings,1998,33(03):14-19. |
| [9] | Dziekan .Process for applying indentification to objects made of porous material[P].US 4954192,1990-08-04. |
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