用电化学阻抗谱(EIS)研究环氧树脂涂层的防腐蚀性能
AN EIS STUDY OF THE ANTICORROSION PERFORMANCE OF EPOXY RESIN COATING
摘 要
测试了环氧树脂/钢体系在3.5% NaCl溶液中的电化学阻抗谱,并结合激光拉曼光谱测量和扫描电镜观察,系统地研究了有机涂层/金属体系性能与失效过程.重点在于涂层内部腐蚀性介质的传输以及涂层/金属界面发生的变化.结果表明:浸泡初期阻抗减小,中期阻抗增大,后期阻抗又减小,这与界面处生成的腐蚀产物膜有关.随着涂层在电解质溶液中浸泡时间的延长,涂层中Cl-浓度增加,破坏了界面处的腐蚀产物膜.
电化学阻抗谱
腐蚀产物膜
防腐蚀性能
Organic coating
Electrochemical impedance spectroscopy(EIS)
Corrosion product film
Anticorrosion performance
Abstract
The performance and failure process of organic coating/metal system was studied.The samples with coating immerged in 3.5% NaCl solution were tested by means of electrochemical impedance spectoscopy(EIS),combined with laser lanman spectroscopy(EIS) and scanning electron microscopy (SEM).The emphasis was put on the corrosive medium transportion and the transformation at the interface between coating and metal.The impedance decreased at the beginning of immersion,then increascd in the metaphase of immersion,and again became minished at last,which was related to the formation of corrosion product films.The concentration of Cl- in the coating increased with the immersion going on,resulting in damage of corrosion product.
中图分类号 TG174.46
所属栏目 试验研究
基金项目
收稿日期 2006/11/20
修改稿日期 2006/12/14
网络出版日期
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引用该论文: ZHANG Ying-huai,XU Li-ning,LU Min-xu,ZHANG Pu. AN EIS STUDY OF THE ANTICORROSION PERFORMANCE OF EPOXY RESIN COATING[J]. Corrosion & Protection, 2007, 28(5): 227～230
被引情况:
【1】屈帅,赵旭辉,唐聿明,左禹, "环氧厚涂底漆在干湿交替环境条件下的劣化过程",腐蚀与防护 34, 137-141(2013)
【2】梁磊, "乙烯基酯树脂鳞片材料在火电厂氨法烟气脱硫系统中的应用",腐蚀与防护 33, 167-170(2012)
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参考文献
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【2】谭晓倩,史鸣军.高分子材料的老化性能研究[J].山西建筑,2006,32(1):179-181.
【3】L Christopher,Soles,Albert Fee.A discussion of the molecular mechanisms of moisture transport in organic coating[J].Polym Sci Polym Phys ed,2000,38,797.
【4】F Mansfeld,C H Tsai.Determination of coating deterioration with EIS:Part I.Basic Relationship[J].Corrosion,1991,47(12):958.
【5】曹楚南,张鉴清.电化学阻抗谱导论[M].北京:科学出版社,2004.
【6】D Pereira,J D Scantlebury,M Ferreira.The application of electrochemical measurements to the study and behavior of zinc-rich coatings[J].Corrosion Science,1990,33(11):1135-1147.
【7】Y Chen,T Hong,M Gopal.EIS Studies of a corrosion inhibitor behavior under multiphase flow conditions[J]. Corrosion Science,2000,42:979-990.
【8】Zhang Jintao,Hu Jiming,Zhang Jianqing.Studies of water transport behavior and importance models of epoxy-coated metals in NaCl solution by EIS[J].Progress in Organic Coatings,2004(51):145-151.
【9】曹楚南.腐蚀电化学原理[M].北京:化学工业出版社,2004:217-222.
【10】Loh,W K,Crocomber A D.The effect of moisture degradation on the failure locus and fracture energy of an epoxy-steel interface[J].Adhesion Sci Technol,2002,16(11):1407.
【11】Brasher D M,Kingsbury A H.Electrical measurements in the study of immersed paint coatings on metal.I.comparison between capacitance and gravimetric methods of estimating water-uptake[J].Appl Chem,1954,4:62.
【12】孙秋霞,张鉴清,林昌健.阻抗谱定量分析金属/有机涂层界面粘接力[J].物理化学学报,2004,20(11):1297-1302.
【13】Deflorian F,Fedrizzi L.Organic coating capacitance measurement by EIS:ideal and actual trends[J].Corrosion,1999,55:1003.
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