利用电化学技术测试不同环氧涂层的扩散系数
Evaluating the Diffusion Coefficient of Different Epoxy Resins with EIS
摘 要
涂层的抗渗透性能是涂层的防腐蚀性能最直接的体现,计算涂层中介质的扩散系数,对于研究涂层的使用寿命具有一定的指导意义.利用EIS技术测试了四种不同环氧当量的环氧树脂的抗渗透性能,分析了EIS图谱,得出了NaCl溶液中不同浸泡时间的涂层的电阻值和电容值,并计算了四种涂层的扩散系数.测试分析结果表明,环氧当量越小的树脂,抗渗透性能越好.
环氧树脂
抗渗透性能
扩散系数
EIS
epoxy resin
anti-penetrability
diffusion coefficient
Abstract
The penetrability of coatings decides the anti-corrosion performance.Calculating the diffusion coefficient is useful for to evaluating the use life of the coating.The diffusion coefficient of different epoxy resins were evaluated by EIS.The curves of the resistance and capacitance of different epoxy resins vs immersion times were obtained. The results of analyses showed that the smaller the epoxide equivalent,is the better the anti-penetrability.
中图分类号 TG174.46
所属栏目 应用技术
基金项目
收稿日期 2008/8/4
修改稿日期 2008/8/28
网络出版日期
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备注张盈盈,工程师.
引用该论文: ZHANG Ying-ying,ZHANG Li-ping,HAN Wen-li,ZHANG Yan-jun,XIE Bei-bei. Evaluating the Diffusion Coefficient of Different Epoxy Resins with EIS[J]. Corrosion & Protection, 2009, 30(9): 665～668
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参考文献
【1】Perez C,Collazo A,Izquierdo M,et al.Characterisation of the barrier properties of different paint systems PartⅠ:Experimental set-up and ideal Fickian diffusion[J].Progress in Organic Coatings,1999(36):102-108.
【2】Perez C,Collazo A,Izquierdo M,et al.Characterisation of the barrier properties of different paint systems PartⅡ:Non-ideal differsion and water uptake kinetics[J].Progress in Organic Coatings,1999(37):169-177.
【3】曹楚南,张鉴清.电化学阻抗谱导论[M].北京:科学出版社,2003,155-167.
【2】Perez C,Collazo A,Izquierdo M,et al.Characterisation of the barrier properties of different paint systems PartⅡ:Non-ideal differsion and water uptake kinetics[J].Progress in Organic Coatings,1999(37):169-177.
【3】曹楚南,张鉴清.电化学阻抗谱导论[M].北京:科学出版社,2003,155-167.
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