NdFeB磁体表面镀铝膜层退镀液配方的研究  

Study on formulation of stripping solution for aluminum coating on surface of NdFeB magnet

作　　者：陈梓赫 代明江[2,3] 胡芳[2,3] 林松盛[2,3] 侯惠君[2,3] 

机构地区：[1]广东工业大学材料与能源学院,广东广州510081 [2]广东省工业技术研究院(广州有色金属研究院)新材料研究所,广东广州510651 [3]广东省现代表面工程技术重点实验室,广东广州510651

出　　处：《电镀与涂饰》2015年第4期176-180,共5页Electroplating & Finishing

基　　金：国家科技支撑计划(2012BAE02B01)

摘　　要：用NaOH作腐蚀剂,添加辅助盐、表面活性剂、配位剂和缓蚀剂,研制了一种高效稳定的NdFeB表面镀铝膜退镀液。以Nd Fe B试样表面的铝含量和基体失重量作为性能评定指标,通过正交试验确定了优化的退镀液配方为:NaOH 10 g/L,Na_2CO_3 30 g/L,十二烷基苯磺酸钠6 g/L,EDTA-2Na 4g/L,六次甲基四胺4 g/L。优化的退镀液在室温条件下退镀3 min,即可把NdFeB基体上约12μm厚的铝膜退除干净,而且退镀后基体的剩磁、矫顽力和最大磁能积仅分别变化1.27%、1.25%和0.47%,磁性能损伤较小。探讨了NdFeB表面镀铝膜层的退镀机理。A highly efficient and stable solution for stripping aluminum coating from the surface of NdFeB magnet was developed based on NaOH as corrosion agent with auxiliary salt, surfactant, coordination agent, and corrosion inhibitor. The content of aluminum coating on surface of NdFeB and the weight loss of substrate were used as performance evaluation indexes. The optimal stripping process was determined by orthogonal test as follows： NaOH 10 g/L, Na2CO330 g/L, sodium dodecyl benzene sulfonate 6 g/L, EDTA-2Na 4 g/L, and hexamethylenetetramine 4 g/L. A 12-1xm thick aluminum coating on surface ofNdFeB substrate can be stripped completely by using the optimized stripping solution at room temperature for 3 min. After stripping, the remanence, coercive force, and maximum magnetic energy product of the substrate are changed only by 1.27%, 1.25%, and 0.47%, respectively. The stripping shows less damage to magnetic properties. The mechanism of stripping aluminum coating on NdFeB surface was discussed.

关 键 词：钕铁硼磁体 铝膜 退镀液 磁性能 

分 类 号：TM273[一般工业技术—材料科学与工程] TG178[电气工程—电工理论与新技术]