纳米SnO2/聚苯胺/环氧复合涂层的防腐蚀性能
Anticorrosive Performance of Nano-SnO2/Polyaniline/Epoxy Composite Coatings
摘 要
采用原位氧化聚合法合成了不同质量比的纳米SnO2/聚苯胺复合材料，运用扫描电镜(SEM)、原子力显微镜(AFM)和X射线衍射(XRD)对材料进行表征，并在304不锈钢表面制备了纳米SnO2/聚苯胺的环氧涂层，利用电化学工作站和浸泡增重试验研究其耐蚀性能。结果表明，纳米SnO2/聚苯胺复合材料的防腐蚀效果优于聚苯胺，且当SnO2在复合材料中的质量分数为4%时，防腐蚀性能最佳。依据不锈钢表面复合涂层的结构，建立合理的等效电路，结合电化学阻抗谱数据，研究了纳米SnO2/聚苯胺/环氧复合涂层耐蚀性增强的机制。
环氧树脂
纳米SnO2/PANI复合材料
腐蚀防护
conducting polymer
epoxy
nano-SnO2/polyaniline composite
corrosion protection
Abstract
Nano-SnO2/polyaniline composite materials with different mass ratios were successfully prepared by in situ chemical polymerization. The as-synthesized materials were characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM) and X-ray diffraction (XRD). And the composite coatings were prepared on the surface of 304 stainless steel (SS). The anticorrosive performance of those composite coatings was investigated by electrochemical tests and immersing experiments. The results showed that the nano-SnO2/polyaniline had superior anticorrosion performance than polyaniline. When the mass ratio of SnO2 was 4% in the mixture of SnO2 and polyaniline，the composite coating exhibited the best anticorrosive property. Based on the structure of the composite coating on 304SS surface, a reasonable equivalent circuit was established. Combining with the EIS data, the mechanism on improving the electrochemical corrosion resistance of the nano-SnO2/polyaniline/epoxy coatings was investigated.
中图分类号 TG174.4
所属栏目 试验研究
基金项目 国家自然科学基金(21003089); 上海市教委科创项目(13YZ103)
收稿日期 2014/8/24
修改稿日期
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备注徐群杰(1969-),教授,博士,从事腐蚀电化学与电厂化学研究
引用该论文: YUN Hong,ZHANG Zhi-guo,QIAN Chao,XU Qun-jie. Anticorrosive Performance of Nano-SnO2/Polyaniline/Epoxy Composite Coatings[J]. Corrosion & Protection, 2014, 35(11): 1092
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【5】太惠玲,蒋亚东,谢光忠,等. 聚苯胺/二氧化钛复合薄膜的制备及其气敏性能[J]. 物理化学学报,2007,23(6):883-888.
【6】AMIR M,FARZAD N. Epoxy/polyanilin-ZnO nanorods hybrid nanocomposite coatings:Synthesis,characterization and corrosion protection performance of conducting paints[J]. Progress in Organic Coatings,2014,77(1)146-159.
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【9】SATHIYANARAYANAN S,AZIM S S,VENKATACHARI G. Corrosion protection of magnesium ZM 21 alloy with polyanilie-TiO2 composite containing coatings[J]. Progress in Organic Coatings,2007,59(4):291-296.
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【11】SATHIYANARAYANAN S,AZIM S S,VENKATACHARI G. Preparation of polyaniline-Fe2O3 composite and its anticorrosion performance[J]. Synthetic Metals,2007,157(18-20):751-757.
【12】ZHU Y H,LIU E H,LUO Z Y,et al. A hydroquinone redox electrolyte for polyaniline/SnO2 supercapacitors[J]. Electrochimica Acta,2014,118(1):106-111.
【13】ALAM M,ANSARI A A,SHAIK M R,et al. Optical and electrical conducting properties of Polyaniline/Tin oxide nanocomposite[J]. Arabian Journal of Chemistry,2013,6(3):341-345.
【14】MANIVEL P,RAMAKRISHNAN S,KOTHUEKAR N K,et al. Optical and electrochemical studies of polyaniline/SnO2 fibrous nanocomposites[J]. Corrosion Science,2013,48(2):640-645.
【15】SATHIYANARAYANAN S,AZIM S S,VENKATACHARI G. Preparation of polyaniline-TiO2 composite and its comparative corrosion protection performance with polyaniline[J]. Journal of the Electrochemical Society,2007,157(4/5):205-213.
【16】SATHIYANARAYANAN S,AZIM S S,VENKATACHARI G. Corrosion protection coating containing polyaniline glass flake composite for steel[J]. Electrochimica Acta,2008,53(5):2087-2094.
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