Anticorrosion performance of the coating/metal system by electrochemical impedance spectra
| Autor: | Lining Xu, Pu Zhang, Minxu Lu, Yinghuai Zhang |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Laser raman
Materials science Scanning electron microscope Mechanical Engineering Metals and Alloys Analytical chemistry engineering.material Geotechnical Engineering and Engineering Geology Corrosion Metal Coating Electrochemical impedance spectra Chemical engineering Mechanics of Materials visual_art Materials Chemistry engineering visual_art.visual_art_medium Immersion (virtual reality) General Materials Science Physical and Theoretical Chemistry Electrical impedance |
| Zdroj: | Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material. 15:457-460 |
| ISSN: | 1005-8850 |
| DOI: | 10.1016/s1005-8850(08)60086-9 |
| Popis: | In order to investigate the anticorrosion performance of the organic coating/metal system, electrochemical impedance spectra (EIS) were measured in the 3.5wt% NaCl solution, the chemical component and the formation of corrosion products scale were analyzed by laser Raman microspectroscopy, and the pattern of the organic coating/metal system was observed by scanning electron microscopy (SEM). The characteristics and the delamination process of the organic coating/metal system were investigated systematically, and the emphases were on the transportation of the corrosive medium and the changes of the coating/metal interface. The results show that the impedance decreases at the initial immersion, then increases at the middle-immersion, and again decreases at last, which is related to the corrosion products scale. The concentration of Cl− in the coating, which destroys the corrosion products scale, increases with the immersion time. |
| Databáze: | OpenAIRE |
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