| 等离子喷涂TiO2涂层的海水环境失效机制 |
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| 引用本文： | 范艳华,尹衍升. 等离子喷涂TiO2涂层的海水环境失效机制[J]. 化工学报, 2006, 57(11): 2682-2685 |
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| 作者姓名： | 范艳华 尹衍升 |
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| 作者单位： | 中国海洋大学材料科学与工程研究院,山东,青岛,266003;中国海洋大学材料科学与工程研究院,山东,青岛,266003 |
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| 基金项目： | 教育部长江学者奖励计划 , 山东省青岛市将才计划项目 , 国家自然科学基金 |
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| 摘 要： | 运用电化学阻抗测试技术对不同腐蚀时间的涂层进行测试，参照等离子喷涂制备的TiO2涂层的形貌结构特点，分析TiO2涂层在海水介质中的腐蚀失效过程.研究表明：涂层的极化电阻在浸泡初期降低较快，后因腐蚀产物和污损物阻塞腐蚀通道，极化电阻又有所上升，趋于稳定.建立合适的等效电路分析涂层腐蚀的阻抗谱，考察各元件参数的变化，进一步分析涂层腐蚀的规律.
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| 关 键 词： | 无机非金属材料 TiO2涂层 电化学阻抗 等效电路 海水腐蚀 |
| 文章编号： | 0438-1157（2006）11-2682-04 |
| 收稿时间： | 2005-10-09 |
| 修稿时间： | 2005-10-092006-01-12 |
Failure mechanism of TiO2 coating deposited by plasma spraying in seawater |
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| FAN Yanhua,YIN Yansheng. Failure mechanism of TiO2 coating deposited by plasma spraying in seawater[J]. Journal of Chemical Industry and Engineering(China), 2006, 57(11): 2682-2685 |
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| Authors: | FAN Yanhua YIN Yansheng |
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| Affiliation: | Institute of Material Science and Engineering, Ocean University of China, Qingdao 266003, Shandong, China |
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| Abstract: | Corrosion of the TiO_ 2 coatings which were exposed to seawater for different time periods were measured with electrochemical impedance spectroscopy(EIS),and their microstructures were investigated with SEM in order to study the corrosion failure process.The results were that the polarization resistance of the TiO_ 2 coatings (a measure of corrosion prevention)dropped sharply at first,and slightly increased to a stable value due to blocking of corrosion product and filths.An appropriate equivalent circuit was established to analyze the EIS,and the change of the parameters of elements in the equivalent circuit were tested in order to analyze the failure mechanism of TiO_ 2 coatings. |
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| Keywords: | inorganic non-metallic materials TiO2 coating electrochemical impedance spectroscopy equivalent circuit seawater corrosion |
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