Structure and Corrosion Resistance Characteristics of ZnAl/EP Coating on Bonded NdFeB Magnet

被引：6
作者：
Yang, Youwen [1 ,2 ]
Jiang, Nan [1 ]
Sun, Yingzhong [1 ]
Yang, Lei [1 ]
Guan, Chuanhai [3 ]
Zhang, Enhua [3 ]
Fang, Xiaogang [1 ,2 ]
Liu, Jiguang [1 ,2 ]
机构：
[1] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Anhui, Peoples R China
[2] Hefei Univ Technol, Engn Res Ctr High Performance Copper Alloy Mat &, Minist Educ, Hefei 230009, Anhui, Peoples R China
[3] Anhui Constant Magnet Magnetoelect Co Ltd, Luan 239000, Anhui, Peoples R China
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2023年 / 32卷 / 12期
关键词：
air spraying; bonded NdFeB; cathodic electrophoretic deposition; corrosion resistance; ZnAl-EP coating; AL; MICROSTRUCTURE;
D O I：
10.1007/s11665-022-07472-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
ZnAl/epoxy resin (ZnAl/EP) composite coating with a thickness of 30.5 mu m was prepared on bonded NdFeB magnetic ring. The morphologies and composition of ZnAl-EP/NdFeB were characterized by scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). The surface roughness of samples was measured by 3D Laser Confocal Scanning Microscope (LCSM). The samples of prepared EP/NdFeB and ZnAl-EP/NdFeB were used for corrosion tests in potentiodynamic polarization method, electrochemical impedance spectroscopy (EIS) and neutral salt spray (NSS) test. The magnetic properties of samples were measured with a permanent magnet material measuring instrument. The corrosion current density (J(corr)) of ZnAl-EP/NdFeB is 1 order of magnitude lower than that of EP/NdFeB, reflecting the corrosion resistance of ZnAl-EP/NdFeB is much higher in contrast with the EP/NdFeB. Compared with the EP/NdFeB, the NSS test time of ZnAl-EP/NdFeB is increased from 72 to 936 h. In addition, the ZnAl-EP coating has no significant effect on the magnetic properties of NdFeB magnetic ring.
引用
收藏
页码：5475 / 5482
页数：8
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