当前位置: X-MOL 学术J. Rare Earths › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Densification and anticorrosion performances of vacuum evaporated aluminium coatings on NdFeB magnets
Journal of Rare Earths ( IF 4.9 ) Pub Date : 2020-11-24 , DOI: 10.1016/j.jre.2020.11.014
Jun Huang , Qing Liu , Zhenyu Yang , Guangqing Xu , Pengjie Zhang , Jun Lv , Wei Sun , Bingshan Li , Dongmei Wang , Yucheng Wu

Al coated NdFeB magnets obtained by vacuum evaporation technique were densified by high energy ball milling method. The surface morphology, metal composition and microstructure of the coatings were characterized by scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy, respectively. The anticorrosive properties were investigated by potentiodynamic polarization curves and neutral salt spray test. The pores in the Al coatings of columnar crystals (Al) induced by the evaporation technique, were apparently filled in the following ball milling process, leading to the densification of Al coatings and the evident improvement of the anticorrosive performances. When treated with ball milling for 30 min, the sample achieves the best anticorrosive performances with the self-corrosion potential of −0.87 V, self-corrosion current density of 1.65 μA/cm2 and the neutral salt spray (NSS) time of 144 h (red rust). The improvement of the anticorrosive performances of vacuum evaporated Al coating mainly lies in the densification effect of the coating, which depends on different loading conditions of ball milling process.



中文翻译:

钕铁硼磁体真空蒸镀铝涂层致密化和防腐性能

采用真空蒸镀技术获得的镀铝钕铁硼磁体,采用高能球磨法进行致密化处理。分别通过扫描电子显微镜、X 射线衍射和 X 射线光电子能谱对涂层的表面形貌、金属成分和微观结构进行了表征。通过动电位极化曲线和中性盐雾试验研究了防腐性能。蒸发技术引起的柱状晶(Al)铝涂层中的孔隙在随后的球磨过程中明显被填充,导致铝涂层致密化和防腐性能明显提高。球磨处理 30 min 后,样品达到最佳防腐性能,自腐蚀电位为 -0.87 V,2和中性盐雾 (NSS) 时间 144 小时(红锈)。真空蒸镀铝涂层防腐性能的提高主要在于涂层的致密化效果,这取决于球磨过程的不同载荷条件。

更新日期:2020-11-24
down
wechat
bug