摘要
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80～90V，沉积电压140～160V，电泳温度控制在28～30℃，电泳时间为150～180s，烘烤工艺采用先70～80℃烘20～30min，再170℃烘烤20min，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1200h以上，耐盐水浸泡120h以上。
A cathodic electrophoresis process was developed for the surface finishing of bonded Nd-Fe-B magnet,with the effects of voltage,time,temperature and curing process on the corrosion resistance of the electrophoresis coating to be focused on.Thus the corrosion resistance of the electrophoresis coating on the Nd-Fe-B magnet substrate was evaluated using salt spray test and hot-humid test.As the results,it was feasible to effectively decrease the porosity of the Nd-Fe-B magnet by the introduction of the electrophoresis coating from a properly selected paint for the electrophoresis.The electrophoresis coating prepared at an initial potential of 80～90 V,deposition potential of 140～160 V,temperature of 28～30 ℃,and electrophoresis duration of 150～180 s,and cured at 70～80 ℃ for 20～30 min and 170 ℃ for 20 min had excellent corrosion resistance.Namely,the resultant electrophoresis coating on the Nd-Fe-B magnet was able to endure salt-spraying up to over 400 h,hot-humid corrosion up to over 1 200 h, and immersion in brine up to over 120 h.
出处
《材料保护》
CAS
CSCD
北大核心
2006年第5期29-32,共4页
Materials Protection
关键词
粘接钕铁硼磁体
阴极电泳
耐腐蚀性能
bonded Nd-Fe-B magnet
cathodic electrophoresis
corrosion resistance
