张鹏杰,曹玉杰,孙威,李炳山,吴玉程,徐光青,张威峰,王永齐,刘辉,刘荣明

• 1:北矿磁材(阜阳)有限公司
• 2:国家磁性材料工程技术研究中心
• 3:北京矿冶科技集团有限公司
• 4:合肥工业大学材料科学与工程学院

摘要(Abstract)：

采用浸涂方式在烧结钕铁硼磁体表面制备CeO_2/硅烷复合涂层,研究了硅烷水溶液中纳米CeO_2颗粒掺杂量对复合涂层性能的影响,通过扫描电镜、能谱分析仪、动电位极化曲线及中性盐雾试验对所制备的CeO_2/硅烷复合涂层的形貌、元素分布以及耐腐蚀性能进行分析。结果表明:纳米CeO_2颗粒的添加增强了涂层的硬度,提高了硅烷涂层的屏蔽性能,延长了腐蚀溶液渗入硅烷涂层的腐蚀通道,复合涂层耐中性盐雾试验能力可达24 h。但由于纳米颗粒只是机械的镶嵌到复合涂层中,不会改变硅烷涂层在固化过程中醇基之间脱水缩合反应的本质,在NaCl溶液中,复合涂层依然会形成高低不同的交联密度区,CeO_2/硅烷复合涂层失效的主要原因依然是在交联密度低的区域首先水解溶解导致的。

关键词(KeyWords)： 烧结钕铁硼;复合涂层;耐腐蚀性能;腐蚀机理

Abstract:

Keywords:

基金项目(Foundation): 北京矿冶科技集团有限公司重点基金项目(20190898000002);; 阜阳市科技重大专项(智能识别磁信息涂层材料的研发及产业化项目)

作者(Author): 张鹏杰,曹玉杰,孙威,李炳山,吴玉程,徐光青,张威峰,王永齐,刘辉,刘荣明

DOI: 10.13289/j.issn.1009-6264.2019-0350

参考文献(References)：

• [1] Sagawa M,Fujimura S,Togawa N,et al.New material for permanent magnets on a base of Nd and Fe (invited)[J].Journal of Applied Physics,1984,55(6):2083-2087.
• [2] Davies B E,Mottram R S,Harris I R.Recent developments in the sintering of NdFeB[J].Materials Chemistry and Physics,2001,67(1):272-281.
• [3] Song Y W,Zhang H,Yang H X.A comparative study on the corrosion behavior of NdFeB magnets in different electrolyte solutions[J].Materials and Corrosion,2008,59(10):794-801.
• [4] Constantinescu C,Patroi E,Codescu M,et al.Effect of nitrogen environment on NdFeB thin films grown by radio frequency plasma beam assisted pulsed laser deposition[J].Materials Science and Engineering B,2013,178(4):267-271.
• [5] Song L Z,Yang Z Y.Corrosion resistance of sintered NdFeB permanent magnet with Ni-P/TiO2 composite film[J].Journal of Iron and Steel Research,International,2009,16(3):89-94.
• [6] Yang H,Mao S,Song Z.The effect of absorbed hydrogen on the corrosion behavior of sintered NdFeB magnet[J].Materials and Corrosion,2015,63(4):292-296.
• [7] Sueptitz R,Uhlemann M,Gebert A,et al.Corrosion passivation and breakdown of passivity of neodymium[J].Corrosion Science,2010,52(3):886-891.
• [8] Wang Y,Deng Y,Ma Y,et al.Improving adhesion of electroless Ni-P coating on sintered NdFeB magnet[J].Surface and Coatings Technology,2011,206(6):1203-1210.
• [9] Zhang P J,Liu J Q,Xu G Q,et al.Anticorrosive property of Al coatings on sintered NdFeB substrates via plasma assisted physical vapor deposition method[J].Surface and Coating Technology,2015,282:86-93.
• [10] Ding J,Xu B,Ling G.Al-Mn coating electrodeposited from ionic liquid on NdFeB magnet with high hardness and corrosion resistance[J].Applied Surface Science,2014,305(305):309-313.
• [11] Chen J,Xu B,Ling G.Amorphous Al-Mn coating on NdFeB magnets:Electrodeposition from AlCl3-EMIC-MnCl2 ionic liquid and its corrosion behavior[J].Materials Chemistry and Physics,2012,134(2/3):1067-1071.
• [12] Guo X,An M,Yang P,et al.Property characterization and formation mechanism of anticorrosion film coated on AZ31B Mg alloy by SNAP technology[J].Journal of Sol-Gel Science and Technology,2009,52(3):335-347.
• [13] Walton A,Speight J D,Willianms A J,Harris I.R.A zinc coating method for Nd-Fe-B magnets[J].Journal of Alloys and Compounds,2000,306(1/2):253-261.
• [14] Palanivel V,Zhu D,Oolj W J V.Nanoparticle-filled silane films as chromate replacements for aluminum alloys[J].Progress in Organic Coatings,2003,47(3/4):384-392.
• [15] Xu J L,Zhong Z C,Huang Z X,et al.Corrosion resistance of the titania particles enhanced acrylic resin composite coatings on sintered NdFeB permanent magnets[J].Journal of Alloys and Compounds,2013,570:28-33.
• [16] Zhang P,Liu J,Xu G,et al.Anticorrosive property of Al coatings on sintered NdFeB substrates via plasma assisted physical vapor deposition method[J].Surface and Coatings Technology,2015,282:86-93.
• [17] Wang N,Cheng K Q,Wu H,et al.Effect of nano-sized mesoporous silica MCM-41 and MMT on corrosion properties of epoxy coating[J].Progress in Organic Coatings,2012,75(4):386-391.
• [18] Ramezanzadeh B,Attar M M.Studying the corrosion resistance and hydrolytic degradation of an epoxy coating containing ZnO nanoparticles[J].Materials Chemistry and Physics,2011,130(3):1208-1219.
• [19] 张浩,张鹏杰,曹玉杰,等.硅烷化处理对烧结钕铁硼永磁材料耐腐蚀性能的影响[J].材料热处理学报,2017,38(12):70-76.ZHANG Hao,ZHANG Peng-jie,CAO Yu-jie,et al.Effect of silanization treatment on corrosion resistance of sintered NdFeB permanent magnets[J].Transactions of Materials and Heat Treatment,2017,38(12):70-76.

文章评论(Comment)：