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| Electrochemical Property for 7B04-T6 Aluminum Alloy Surface Protective Coating in the Presence of Outfield Corrosion |
| Received:February 25, 2019 Revised:May 25, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2019.05.000 |
| KeyWord:new nano coating corrosion environment 7b04 aluminum alloy electrochemical impedance corrosion resistance |
| Author | Institution |
| MU Xian-lian |
Aviation Key Laboratory of Science and Technology on Structural Corrosion Prevention and Control, China Special Vehicle Research Institute, Jingmen , China |
| HU Yang |
Aviation Key Laboratory of Science and Technology on Structural Corrosion Prevention and Control, China Special Vehicle Research Institute, Jingmen , China |
| JIN Tao |
Aviation Key Laboratory of Science and Technology on Structural Corrosion Prevention and Control, China Special Vehicle Research Institute, Jingmen , China |
| WU Shao-hua |
Aviation Key Laboratory of Science and Technology on Structural Corrosion Prevention and Control, China Special Vehicle Research Institute, Jingmen , China |
| LIU Cheng-chen |
Aviation Key Laboratory of Science and Technology on Structural Corrosion Prevention and Control, China Special Vehicle Research Institute, Jingmen , China |
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| Abstract: |
| Objective To evaluate the corrosion resistance of new nano coating under the conditions of natural exposure. Methods Yongxing Island in Paracel was selected as a natural exposure field. The test pieces were treated for pre-damage. 7b04-T6 aluminum alloy/new nano coating and typical corrosion resistant coating of Tianjin Lighthouse Coating Co., Ltd. were tested for outfield exposure under conditions of high salt fog, typical hot and humid, strong ultraviolet radiation and other com-prehensive corrosion environment. The electrochemical impedance technology was used to compare and research two kinds of coatings immersed in 3.5% NaCl solution for different period before and after the exposure. Results After field exposure test of two coatings, the electrochemical impedance value decreased. With the increase of 3.5% NaCl solution soaking time, the Rp value was decreased constantly, and CPE-T value increased constantly. Conclusion The new nano-coating has no corrosion loss and failure after field exposure test for 1 year, and still has good salt-water resistance, but its weather resistance is worse than that of the coating of Tianjin Lighthouse Coating Co., Ltd. |
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