阻抗谱定量分析金属/有机涂层界面粘接力
Quantitatively Predicate State of Adhesion between Coating/Metal Interface by EIS Measurements
查看参考文献36篇
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文摘
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采用传输线类型的CR电路解析阻抗谱得到离散的电容参数,它们随离散特征频率变化的线性区间斜率与有机涂层/金属界面的瞬时脱层速率有关,不受缺陷位置腐蚀产物的影响,重现性好.建立了阻抗谱与粘结力的定量关系和数据处理方法,并进行了验证,说明了精度较高的原因.用硅烷直接预处理,或者磷化、热浸锌后再处理,会明显影响A3钢与环氧粉末涂层之间的粘结力. |
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其他语种文摘
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According to the experimental results and the basic concept that the capacitive contribution of the coating/metal system to EIS can reflect the change occurring at interface sensitively, the quantitative relationship between the adhesion and the analytical result of EIS is established. The approach is using the transmission line modeKCR circuit) to obtain the discrete capacitance values, analyzing the physical meaning of the slope at the re-gion in which the discrete capacitances change linearly with the discrete characteristic frequency. The data han-dling method is also given in detail. The relationship is validated by experiments. The results show that under cer-tain conditions, the slopes are mainly determined by the speed of instantaneous delamination at organic coating/ metal interface and are not influenced by the corrosion product built up at the artificial defect, so they have good reproducibility despite the EIS of duplicate samples showing very different configuration. The analytical results from EIS are often higher than that of mechanical measurements when adhesion is strong. Explanation of the dis-crepancy shows that the results from EIS are more accurate and reasonable. In regard to epoxy powder paints and A3 steel, the results also indicate that the pretreatment of substrate using silane with and without hot-dip galvanized or phosphate treatment can influence markedly the adhesion between substrate and coating. |
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来源
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物理化学学报
,2004,20(11):1297-1302 【核心库】
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DOI
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10.3866/pku.whxb20041103
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关键词
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阻抗谱
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传输线
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界面粘接力
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有机涂层
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A3钢
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地址
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1.
浙江大学化学系, 杭州, 310027
2.
浙江大学化学系, 金属腐蚀与防护国家重点实验室, 杭州, 310027
3.
厦门大学, 固体表面物理化学国家重点实验室, 厦门, 361005
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-6818 |
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学科
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化学 |
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基金
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国家973计划
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文献收藏号
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CSCD:1658671
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参考文献 共
36
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