摘要
通过水热合成法制备钒酸铈(CeVO_(4))纳米填料,将CeVO_(4)分散到环氧树脂中获得改性涂层。分别涂覆在打磨后碱洗处理铝合金和直接喷砂处理铝合金上。采用XRD、FT-IR和SEM对CeVO_(4)粉体进行表征,并通过附着力测试、电化学阻抗和长期浸泡实验对改性前后的涂层进行研究。结果表明:利用水热合成法可成功制备CeVO_(4)纳米填料,CeVO_(4)改性后的环氧涂层的性能明显提升其中,喷砂处理的铝合金涂层性能最佳,浸泡前附着力为8.43 MPa,浸泡7000 h后附着力为5.77 MPa,涂层阻抗值稳定在9.50×10^(10)Ω·cm^(2);而打磨碱洗处理的铝合金涂层浸泡前附着力3.28 MPa,浸泡7000 h后1.59 MPa,涂层阻抗值稳定在2.28×10^(10)Ω·cm^(2)。因此,涂覆于喷砂处理的铝合金表面的钒酸铈改性涂层具有更优的防腐性能.
The cerium vanadate(CeVO_(4))nanofiller was prepared by hydrothermal synthesis process,which was then dispersed in epoxy resin to obtain modified coatings,which were coated respectively on the alkaline washing treated aluminium alloy after sanding and the direct sandblasting treated aluminium alloy substrates.The CeVO_(4)powder was characterized by XRD,FT-IR and SEM,and performances of the modified and unmodified coatings were studied through adhesion test,electrochemical impedance spectroscopy and long-term immersion experiment.The results showed that the CeVO_(4)nanofiller could be successfully prepared by hydrothermal synthesis method,and the performance of the CeVO_(4)modified coatings was significantly improved.The modified coatings showed the best performance on the sandblasted aluminum alloy.Specifically,after 7000 h immersion,the coatings adhesion on the sandblasted aluminium alloy decreased from 8.43 MPa to 5.77 MPa,while it decreased from 3.28 MPa to 1.59 MPa on the aluminum alloy treated by sanding and alkali washing;and their resistances were stabilized at 9.50×10^(10)Ω·cm^(2) and 2.28×10^(10)Ω·cm^(2),respectively.Therefore,the modified coatings showed better anti-corrosion performance on the sandblasted aluminum alloy.
作者
张春江
彭强
窦宝捷
林修洲
张颖君
詹兴刚
刘瑜
程科利
Zhang Chunjiang;Peng Qiang;Dou Baojie;Lin Xiuzhou;Zhang Yingjun;Zhan Xinggang;Liu Yu;Cheng Keli(College of Materials Science and Engineering,Sichuan Univeristy of Science&Engineering,Zigong,Sichuan 643000,China;Key Laboratory for Corrosion and Protection of Materials of Sichuan Province,Zigong,Sichuan 643000,China;Surface Treatment Technology Engineering Research Center of Guizhou Province,Zunyi,Gitizlwu 563006,China;Guizhou Aerospace Precision Manufacturing Co.,Ltd.,Zunyi,Guizhou 563006,China)
出处
《涂料工业》
CAS
CSCD
北大核心
2022年第2期33-41,共9页
Paint & Coatings Industry
基金
国家自然科学基金(E51901146)
四川省科技计划资助(2020JDRC0098,2021YFG0246)
四川轻化工大学人才引进项目(2018RCL14)。
