【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,Na₂CO₃ 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。更多还原

【Abstract】 A highly efficient and stable solution for stripping aluminum coating from the surface of Nd Fe B magnet was developed based on Na OH as corrosion agent with auxiliary salt, surfactant, coordination agent, and corrosion inhibitor. The content of aluminum coating on surface of Nd Fe B 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, Na₂CO₃ 30 g/L, sodium dodecyl benzene sulfonate 6 g/L, EDTA-2Na 4 g/L, and hexamethylenetetramine 4 g/L. A 12-μm thick aluminum coating on surface of Nd Fe B 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 Nd Fe B surface was discussed.更多还原