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| Accelerated Aging Dynamic Rules of Aeronautic Organic Coating Based on Electrochemical Impedance |
| Received:April 26, 2016 Revised:January 15, 2017 |
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| DOI：10.7643/ issn.1672-9242.2017.01.002 |
| KeyWord:accelerated testing spectrum organic coating aging electrochemical impedance |
| Author | Institution |
| TAN Xiao-ming |
Qingdao Branch, Naval Aeronautical and Astronautical University, Qingdao , China |
| WANG Peng |
Military Representative Office of Navy in Jingdezhen, Jingdezhen , China |
| WANG De |
Qingdao Branch, Naval Aeronautical and Astronautical University, Qingdao , China |
| QIAN Ang |
Qingdao Branch, Naval Aeronautical and Astronautical University, Qingdao , China |
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| Abstract: |
| bjective To study the accelerated aging dynamic rules of organic coating. Methods Accelerated aging testing spectrum of organic coating was prepared and equivalent accelerated aging test of 0～9a was carried out according to conditions and features of environment in which the plane will serve. The electrochemical impedance of coating specimens after aging tests was tested by virtue of the PARSTAT 4000 electrochemical workstation. Results Bode diagram, equivalent circuit, porosity, water absorption and electrochemical impedance of organic coatings with different aging period were obtained. Dynamic rules of accelerated aging test were characterized. Conclusion Low-frequency impedance |Z|0.01 can be used as index for evaluation of anti-corrosion coating. The aging process coating can be divided into three stages of early, middle and later, corresponding to three different equivalent circuits. |
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