Electrochemical behavior of different shelled microcapsule composite copper coatings |
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Authors: | Xiu-qing Xu Yan-hong Guo Wei-ping Li Li-qun Zhu |
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Institution: | (1) State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, No. 8 Xindu Road, Chengdu, 610500, China;(2) Ocean University of China, No.238 Songling Road, Qingdao, 266100, China;(3) State Key Laboratory for Corrosion and Protection, 62 Wencui Road, Shenyang, 110015, China;(4) Cangzhou Entry-Exit Inspection and Quarantine Bureau, No. 28 Jiefang Road, Cangzhou, 061000, China |
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Abstract: | Copper/liquid microcapsule composite coatings with polyvinyl alcohol (PVA), gelatin or methyl cellulose (MC) as shell materials
were prepared by electrodeposition. The influence of shell materials on the corrosion resistance of the composite coatings
in 0.1 M H2SO4 was investigated by means of electrochemical techniques, scanning electron microscopy (SEM), and energy dispersion
spectrometry (EDS). The results show that the participation of microcapsules can enhance the corrosion resistance of the composite
coatings compared with the traditional copper layer. Based on the analysis of electrochemical test results, the release ways
of microcapsules were deduced. Gelatin and MC as the shell materials of microcapsules are easy to release quickly in the composite
coating. On the contrary, the releasing speed of PVA microcapsules is relatively slow due to their characteristics. |
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