双极性涂层浸泡过程的电化学阻抗谱行为
Electrochemical Impedance Spectroscopy Behavior of Epoxy-based Bipolar Coating during Immersion
摘 要
制备了仿金属钝化膜的双极性环氧基有机涂层。测试了双极性环氧基涂层/16Mn体系在5% KCl溶液中的电化学阻抗谱,以研究该体系的性能及失效过程。结果表明, 在浸泡初期, 由于双极性环氧基有机涂层离子选择性, 能有效阻止或抑制腐蚀性介质的浸入; 随浸泡时间的延长, 在阴阳膜层的结合处形成“空间电荷区”或“耗尽层”, 对金属腐蚀的防护起关键作用。
电化学阻抗谱
离子选择性
耗尽层
bipolar coating
electrochemical impedance spectroscopy (EIS)
ionic selectivity
depletion layer
Abstract
An epoxy-based bipolar coating was prepared and the electrochemical behavior of the epoxy-based bipolar coating/16Mn system immersed in 5% KCl solution was studied by electrochemical impedance spectroscopy (EIS). The results showed that at the first stage the coating could prevent the penetration of corrosive media effectively, because of its ionic selectivity. With the immersion time prolonged, the space charge region or depletion layer formed at the boundary of the anion-selective and cation-selective unipolar membranes could inhibit the metal corrosion.
中图分类号 TG174.3+6
所属栏目 试验研究
基金项目
收稿日期 2010/3/26
修改稿日期 2010/4/8
网络出版日期
作者单位点击查看
备注苏晓妹,博士研究生,
引用该论文: SU Xiao-mei,ZHOU Qiong,ZHANG Yu,ZHANG Qing-yi. Electrochemical Impedance Spectroscopy Behavior of Epoxy-based Bipolar Coating during Immersion[J]. Corrosion & Protection, 2011, 32(1): 29
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参考文献
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【2】Norio Sato. Toward a more fundamental understanding of corrosion processes[J]. Corrosion,1989,45(5):354-368.
【3】王周成, 苏方腾, 辜志俊. Fe在双极性有机涂层下的腐蚀和电化学行为研究[J]. 腐蚀科学与防护技术, 1994, 6(1): 1-6.
【4】王周成, 张瀛洲, 周绍民. A3钢在离子选择性涂层下的腐蚀电化学行为[J]. 厦门大学学报(自然科学版), 1997, 36(3): 388-392.
【5】王周成, 张瀛洲, 周绍民,等. 铜在离子选择性涂层下腐蚀行为的阻抗谱研究[J]. 电化学, 1997, 3(3): 271-276.
【6】王周成, 杜荣归, 胡艳玲,等. 不同离子交换体对碳钢在有机涂层下腐蚀行为的影响[J]. 材料保护, 2001, 34(10): 9-10.
【7】Wang J. Anion exchange nature of emeraldine base (EB) polyaniline (PAn) and a revisit of the EB formula[J]. Synthetic Metals,2002,132(1),49-52.
【8】Wang J. Polyaniline coatings: anionic membrane nature and bipolar structures for anticorrosion[J]. Synthetic Metals,2002,132(1):53-56.
【9】Wang J g,Charlie C Torardi, Michael W Duch. Polyaniline-related ion-barrier anticorrosion coatings I. Ionic permeability of polyaniline,cationic and bipolar films[J]. Synthetic Metals,2007,137(21):846-850.
【10】Wang J G,Charlie C Torardi, Michael W Duch. Polyaniline-related ion-barrier anticorrosion coatings II. Protection behavior of polyaniline,cationic and bipolar films[J]. Synthetic Metals,2007,157(21):851-858.
【11】傅荣强, 徐铜文, 杨伟华. 双极膜中间界面层研究进展[J]. 膜科学与技术, 2002, 22(6): 42-47.
【12】Mauro A. Space charge regions in fixed charge membranes and the associated property of capacitance[J]. Biophys J,1962,2:179-198.
【13】Tadashi Hosono,Akihiko Tanioka. Effect of polymer composition in intermediate layer on water splitting in bipolar membranes[J]. Polymer, 1998, 39(18): 4199-4204.
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