Study on preparation and properties of CeO2/epoxy resin composite coating on sintered NdFeB magnet

被引：31

作者：

Zhang, Pengjie ^{[1
,2
,3
,4
]}

Zhu, Minggang ^{[2
]}

Li, Wei ^{[2
]}

Xu, Guangqing ^{[1
]}

Huang, Xiulian ^{[3
]}

Yi, Xiaofei ^{[3
]}

Chen, Jingwu ^{[3
]}

Wu, Yucheng ^{[1
]}

机构：

[1] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Anhui, Peoples R China

[2] Cent Iron & Steel Res Inst, Beijing 100081, Peoples R China

[3] Earth Panda Advance Magnet Mat Co Ltd, State Key Lab Rare Earth Permanent Magnet Mat, Hefei 231500, Anhui, Peoples R China

[4] Hefei Univ Technol, Sch Mech Engn, Hefei 230009, Anhui, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2018年 / 36卷 / 05期

基金：

中国博士后科学基金;

关键词：

Sintered NdFeB; Epoxy resin; CeO2; nanoparticle; Corrosion resistance; Rare earths; CORROSION-RESISTANCE; TITANIA PARTICLES; ND; PERFORMANCE; DEPOSITION; BEHAVIOR; DY;

D O I：

10.1016/j.jre.2017.11.012

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The CeO2/epoxy resin composite coating was deposited on NdFeB substrate by cathode electrophoresis method for enhancing the anticorrosion and anti-wear performances. The morphologies and structures were characterized by a scanning electron microscope and an X-ray diffractometer. The micro hardness of the composite coating was evaluated by a microhardness tester. The corrosive behaviors of the coatings were studied by potentiodynamic polarization curve, electrochemical impedance spectroscopy and neutral salt spray tests. The concentration of CeO2 nanoparticles (NPs) in the electrophoresis bath was optimized according to the coating structures and anticorrosion performances. The results show that CeO2 NPs can enhance the microhardness of the composite coatings. Moreover, the nanoparticles disperse uniformly in the matrix when the concentration is lower than 30 g/L. The microhardness of CeO2/epoxy resin (30 g/L) composite coating is about 63% higher than that of the blank epoxy resin coating. And the NSS time of the CeO2/epoxy resin (30 g/L) composite coated sample can reach 1248 h. Meanwhile, the composite coatings possess no deteriorate influence on the magnetic properties of NdFeB substrates. The anticorrosion mechanisms of the composite coatings on the NdFeB substrate are deeply discussed. (C) 2018 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.

引用

页码：544 / 551

页数：8

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