(1. 浙江工业大学 化学工程学院，杭州 310014；
2. 浙江工业大学 绿色化学合成技术国家重点实验室培训基地，杭州 310014)
摘 要: 为了提高铝基材料的抗腐蚀性能，采用插层复合法在铝片表面制备具有良好韧性、耐磨性和耐盐耐酸性能的蒙脱石/环氧树脂复合涂层。研究不同膜厚对涂层在1.0 mol/L NaCl溶液和0.5 mol/L H2SO4溶液中抗腐蚀性能的影响。采用光学显微镜、小角X射线衍射、红外光谱、SEM和TEM等手段表征防腐涂层的表面结构、物相组成、化学组成和微结构等特征；采用Tafel极化曲线和EIS交流阻抗图谱等手段测试了其电化学防腐性能。结果发现：经剥离改性后的蒙脱石(001)晶面间距从1.4490 nm扩大到了2.8504 nm。膜的厚度与其防腐性能密切相关；当膜厚为0.66 mm时，其防腐性能较好，在NaCl溶液中的腐蚀电位为0.8794 V，腐蚀电阻为3412 Ω·cm2；在H2SO4溶液中的腐蚀电位为0.5285 V，腐蚀电阻为5313 Ω·cm2。
关键字: 蒙脱石；环氧树脂；纳米复合；涂层；电化学性能
（1. School of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China;
2. State Key Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China）
Abstract:In order to improve the corrosion resistance of aluminum-based materials, a Mnt/epoxy anti-corrosion composite membrane with good smoothness, wear property and resistance to acidic and salty corrosion was prepared by intercalation composite method. The effect of membrane thickness on the corrosion resistance of the membrane was emphatically studied in NaCl(1.0 mol/L) and H2SO4(0.5 mol/L) solution. The surface structure, crystal phase, chemical composition, microstructure of the anti-corrosion composite membrane were characterized by optical microscopy, small angle X-ray diffraction, FTIR, SEM and TEM. The results show that the interplanar distance of Mnt modified is expanded from 1.4490 nm to 2.8504 nm. The electrochemical corrosion resistance of the membrane was tested with Tafel polarization curves and EIS. The results show that the thickness of the membrane has a positive effect on its anti-corrosion performance. When the thickness is 0.66 mm, the corrosion potential and resistance are 0.8794 V and 3412 Ω·cm2 in NaCl solution, respectively, and they are 0.5285 V and 5313 Ω·cm2 in H2SO4 solution. These results indicate that the membrane exhibits excellent anticorrosive property, which can be found wide applications.
Key words: montmorillonite; epoxy resin; nanocomposite; anticorrosive membrane; electro-chemical performance
