| 引用本文: | 李芝华,胡建康,李彦博,郑峰,刘军.Ce3+掺杂聚苯胺中空微球/环氧涂层防腐蚀研究[J].材料科学与工艺,2018,26(3):23-30.DOI:10.11951/j.issn.1005-0299.20170195. |
| LI Zhihua,HU Jiankang,LI Yanbo,ZHENG Feng,LIU Jun.Anticorrosion study of epoxy coating with Ce3+ doped polyaniline hollow microspheres[J].Materials Science and Technology,2018,26(3):23-30.DOI:10.11951/j.issn.1005-0299.20170195. |
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| 摘要: |
| 聚苯胺作为一种新型的防腐蚀材料，在钢铁防腐蚀领域具有良好的应用前景.通过自组装法在聚(2-丙烯酰胺基-2-甲基丙磺酸) (PAMPS)水溶液中制备了聚苯胺(PANI)中空微球，将稀土Ce3+掺杂到聚苯胺中空微球表面制备了一种新型的Ce3+掺杂修饰的聚苯胺中空微球(PANI-Ce3+).以PANI-Ce3+中空微球为防腐填料添加到环氧树脂(EP)中，制备Ce3+掺杂修饰的聚苯胺中空微球/环氧(PANI-Ce3+/EP)防腐涂层.采用FT-IR、UV-Vis、SEM、XRD等对PANI-Ce3+中空微球进行表征，通过动电位极化法、交流阻抗测试探究PANI-Ce3+/EP涂层的防腐蚀性能.结果表明：PANI-Ce3+/EP涂层具有较高的腐蚀电压(Ecorr=-0.414 V)和较小的腐蚀电流密度(Icorr=0.676×10-5 μA/cm2)；PANI-Ce3+/EP涂层低频区阻抗模量随浸泡时间呈现先减小后增大的变化趋势，在质量分数3.5%的NaCl水溶液中经过1 680 h腐蚀后，阻抗模量保持在106.6 Ω·cm2；表面有划伤的PANI-Ce3+/EP涂层在质量分数3.5%的NaCl水溶液进行1 680 h腐蚀实验后，涂层表面不起泡，仅在划痕处有少量铁锈.PANI-Ce3+/EP涂层表现出优异的耐腐蚀性能.
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| 关键词: 聚苯胺中空微球 Ce3+掺杂 涂层 耐腐蚀性能 自组装法 |
| DOI：10.11951/j.issn.1005-0299.20170195 |
| 分类号:TQ637 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(51472271). |
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| Anticorrosion study of epoxy coating with Ce3+ doped polyaniline hollow microspheres |
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LI Zhihua, HU Jiankang, LI Yanbo, ZHENG Feng, LIU Jun
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(School of Materials Science and Engineering, Central South University, Changsha 410083, China)
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| Abstract: |
| As a kind of novel anticorrosion materials, polyaniline (PANI) exhibits great potentials in the field of steel anticorrosion. PANI hollow microspheres were fabricated by self-assembly method in poly (2-acrylamido-2-methylpropanesulfonic acid) (PAMPS) aqueous solution. After then, Ce3+ ions were loaded onto PANI to prepare Ce3+ doped PANI (PANI-Ce3+) hollow microspheres. PANI-Ce3+ hollow microspheres were employed as functional additives and dispersed in epoxy resin (EP). Structure and morphology of PANI-Ce3+ hollow microspheres were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM) etc. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization test were employed to analyze anticorrosion performance of PANI-Ce3+/EP coatings explored in 3.5wt.% NaCl aqueous solution for 1 680 hours. Tafel plots showed that PANI-Ce3+/EP coating exhibited high corrosion potential (Ecorr=-0.414 V) and small corrosion current density (Icorr=0.676×10-5 μA/cm2). In addition, Bode plots showed that impedance in low frequency region decreased firstly and then increased with soaking time. Impedance values were maintained at 106.6 Ω·cm2 explored in 3.5wt.% NaCl aqueous solution for 1 680 hours. Meanwhile, no blister was observed and corrosion just occurred around the scratches after PANI-Ce3+/EP coatings with scratches on the surface were explored in 3.5wt.% NaCl aqueous solution for 1 680 hours, indicating their excellent anticorrosion performances.
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| Key words: polyaniline hollow microspheres Ce3+ doped coating anticorrosion performance self-assembly method |
