基于电化学阻抗谱的航空用环氧底漆失效过程及动力学规律研究

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英文篇名：Failure Process and Dynamic Rules of Aeronautic Epoxy Primer Based on Electrochemical Impedance Spectroscopy 作者：李书博 ; 齐乐 ; 徐飞 ; 王亮兵 ; 徐涛涛 ; 穆巍炜 英文作者：LI Shubo;QI Le;XU Fei;WANG Liangbing;XU Taotao;MU Weiwei;AVIC Tianjin Aviation Electro-mechanical Co.,Ltd;PLA Air Force Tianjin Military Representative Office; 关键词：环氧底漆 ; 连续浸泡 ; 电化学阻抗谱 英文关键词：epoxy primer;;continuous immersion;;electrochemical impedance spectroscopy 中文刊名：电镀与精饰 英文刊名：Plating & Finishing 机构：航空工业天津航空机电有限公司;中国人民解放军天津空军军事代表室; 出版日期：2019-03-15 出版单位：电镀与精饰 年：2019 期：03 语种：中文; 页：14-18 页数：5 CN：12-1096/TG ISSN：1001-3849 分类号：TQ637

摘要

采用电化学阻抗谱研究了航空用环氧底漆在3.5%NaCl溶液中连续浸泡条件下的失效过程。结果表明,涂层在连续浸泡条件下的失效过程主要分为五个阶段,即浸泡初期阶段、渗透初期阶段、渗透中期阶段、渗透末期阶段和涂层失效阶段。通过对不同浸泡时期的Nyquist图和Bode图进行分析,得到了涂层电阻、电容、孔隙率和吸水率随浸泡时间的变化规律,通过分析低频区阻抗|Z|_(0.01)随浸泡时间的变化,得到了|Z|_(0.01)随浸泡时间变化的动力学方程。
        The failure process of aeronautic epoxy primer under continuous immersion in 3.5 % NaCl solution was studied by electrochemical impedance spectroscopy. The results showed that the failure process of the coating under continuous immersion conditions was mainly divided into five stages,the initial stage of immersion,the initial stage of infiltration,the middle stage of infiltration,the end stage of infiltration and the stage of coating failure. By analyzing the Nyquist and Bode diagrams of different immersion periods,the variation of coating resistance,capacitance,porosity and water absorption with immersion time were obtained. By analyzing the change of impedance in low frequency region |Z|_(0.01) with immersion time,the dynamic rules of |Z|_(0.01) with the immersion time was obtained.

引文

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