摘要
先以Fe Cl_2和Fe Cl_3为原料,用化学共沉淀法制备了Fe_3O_4纳米粒子,再在其表面包覆Si O_(2)制得Fe_3O_4@Si O_(2)颗粒,然后将Fe_3O_4@Si O_(2)颗粒与水性环氧-丙烯酸酯乳液混合制备了复合涂层。采用透射电镜、红外光谱仪和X射线衍射仪表征了Fe_3O_4纳米粒子改性前后的形貌和晶体结构。通过塔菲尔极化曲线和浸泡试验考察了纳米粒子对复合涂层在自来水、3.5%(质量分数)HCl、3.5%Na OH和3.5%Na Cl溶液中耐蚀性的影响,并探讨了涂层的防腐机理。Si O_(2)成功包覆到Fe_3O_4粒子表面,提高了其与水性环氧–丙烯酸酯乳液的相容性,显著改善了复合涂层的防腐性能。
Ferroferric oxide(Fe3O4)nanoparticles were prepared by chemical coprecipitation from FeCl2 and FeCl3,and then coated with silicon oxide(SiO2)to get the Fe3O4@SiO2 particles.A composite coating was obtained by mixing the Fe3O4@SiO2 particles with waterborne epoxy-acrylate emulsion.The morphology and crystal structure of the nano-Fe3O4 before and after modification were characterized by transmission electron microscope,infrared spectroscope and X-ray diffractometer.The effect of the addition of nano particles on corrosion resistance of the composite coating was studied through Tafel curve measurement and immersion test in tap water as well as in 3.5wt%HCl,3.5%NaOH and 3.5%NaC1 solutions.The corrosion protection mechanism was discussed.Coating with SiO2 enhances the compatibility of nano-Fe3O4 with waterborne epoxy-acrylate emulsion,resulting in a remarkable improvement in anticorrosion performance of the composite coating.
作者
刘野
查少秋
张凯
LIU Ye;ZHA Shao-qiu;ZHANG Kai(Hubei Key Laboratory for Processing and Application of Catalytic Materials,School of Chemical Engineering,Huanggang Normal University,Huanggang 438000,China)
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2016年第10期506-510,共5页
Electroplating & Finishing
关键词
水性环氧-丙烯酸酯乳液
纳米复合涂层
四氧化三铁
二氧化硅
改性
防腐
waterborne epoxy-acrylate emulsion
nanocomposite coating
ferroferric oxide
silicon oxide
modification
corrosion resistance
