| 传输线模型分析有机涂层厚度对阻抗谱的影响 |
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| 引用本文： | 孙秋霞,张鉴清,林薇薇. 传输线模型分析有机涂层厚度对阻抗谱的影响[J]. 金属学报, 2004, 40(11): 1205-1209 |
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| 作者姓名： | 孙秋霞 张鉴清 林薇薇 |
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| 作者单位： | 浙江大学化学系,杭州,310013;韶关学院化学系,韶关,512005;浙江大学化学系,杭州,310013;中国科学院金属研究所金属腐蚀与防护国家重点实验室,沈阳,110016;浙江大学高分子系,杭州,310013 |
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| 基金项目： | 国家重点基础研究发展规划资助项目G19990650 |
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| 摘 要： | 根据传输线类型的CR电路和结构固定的QR电路之间关系所建立的分析阻抗谱的方法，探讨了有机涂层厚度的不同影响及其应用．CR电路拟合稳定性较高，对于完整涂层，其参数C0随涂层吸水量增加的变化比恒相位角元件参数Y0更有规律，导出参数A1和B1可评价涂层厚度对阻挡性的影响．对于阻挡性不完整的薄涂层，在一定厚度范围内，离散电容Ci随特征频率f^*变化的对数曲线斜率与涂层厚度无关，但与离散电容和电阻的相对增量比有确定的关系，可用于评价金属／涂层界面粘结力的变化，并解释了其原因。
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| 关 键 词： | 阻抗谱 传输线 涂层厚度 阻挡性 粘结力 |
| 文章编号： | 0412-1961(2004)11-1205-05 |
ANALYSIS OF THE EFFECT OF ORGANIC COATING THICKNESS ON EIS BY TRANSMISSION LINE MODEL |
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| SUN Qiuxia,ZHANG Jianqing,LIN Weiwei). ANALYSIS OF THE EFFECT OF ORGANIC COATING THICKNESS ON EIS BY TRANSMISSION LINE MODEL[J]. Acta Metallurgica Sinica, 2004, 40(11): 1205-1209 |
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| Authors: | SUN Qiuxia ZHANG Jianqing LIN Weiwei) |
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| Affiliation: | SUN Qiuxia,ZHANG Jianqing,LIN Weiwei1) Department of Chemistry,Zhejiang University,Hangzhou 3100272) Department of Polymer Science and Engineering,Zhejiang University,Hangzhou 3100273) State Key Laboratory for Corrosion and Protection,Institute of Metal Research,The Chinese Academy of Sciences,Shenyang 1100164) Department of Chemistry,Shaoguan University,Shaoguan 512005 |
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| Abstract: | According to the relationship of the transmission line model (CR circuit) and the fixed configuration model (QR circuit), the analytical method of electrochemical impedance spectroscopy is established, by which the effect of coating's thickness and its application are investigated. The results show that for intact coating the fitting stability of CR circuit is higher than that of QR circuit. As compared to the parameter of constant phase element Y0, it is more regularity for the relationship of C0 with the state change of coating due to uptake water. The parameters of A1 and B1 deduced from that can be used to evaluate the effect of coating thickness on barrier qualities. Moreover, within some range the logarithmic linear slope of parameter Ci; vs characteristic frequency f* is not effected by the thickness of the coating with incomplete barrier properties, and has a certain connection with the ratio between the relative increment of capacitance and that of resistance, which could be used to assess the change of adhesion between organic coating/metal interface, and the reason is given. |
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| Keywords: | electrochemical impedance spectroscopy (EIS) transmission line coating thickness barrier quality interfacial adhesion |
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