| 引用本文: | 曹京宜,唐建华,付婷,张寒露,赵旭辉,唐聿明,左禹.含氧化亚铜和有机防污剂的两种防污涂层失效过程对比[J].中国表面工程,2019,32(6):105~112 |
| CAO Jingyi,TANG Jianhua,FU Ting,ZHANG Hanlu,ZHAO Xuhui,TANG Yuming,ZUO Yu.Comparisons on Degradation Process of Two Antifouling Coatings Containing Cu2O and Organic Antifouling Agents[J].China Surface Engineering,2019,32(6):105~112 |
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| 摘要: |
| 防污剂的种类和含量不同其渗出机制与失效过程也不相同，随着防污涂层树脂的水解和防污剂的溶出，防污涂层作为第一道屏障其失效情况也会影响整个防污防腐涂层体系对基体的保护作用。采用电化学交流阻抗(EIS)技术，结合SEM/EDS以及红外光谱(FTIR)等方法研究了两种含氧化亚铜和有机防污剂的防污涂层在3.5% NaCl溶液中的水解失效过程以及涂层配套体系对基体铝合金的保护作用。结果表明：两种涂层体系在常温3.5% NaCl溶液中浸泡4年后其低频阻抗仍然很高，对基体仍然具有良好的保护性能；热循环加速试验(45 ℃12 h + 25 ℃12 h)大大促进了防污面漆在NaCl溶液中的水解以及可溶性颜填料与防污剂的溶出，含氧化亚铜较高的W1面漆表面形成大量的微裂纹，导致试样低频阻抗迅速下降，整体屏蔽性能降低；含多硫代化合物的W2面漆柔韧性较好，少有裂纹，涂层的整体屏蔽性能下降较缓。 |
| 关键词: 防污涂层 氧化亚铜 多硫代化合物 保护性能 |
| DOI：10.11933/j.issn.1007-9289.20190305002 |
| 分类号:TG174.46 |
| 基金项目: |
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| Comparisons on Degradation Process of Two Antifouling Coatings Containing Cu2O and Organic Antifouling Agents |
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CAO Jingyi1, TANG Jianhua2, FU Ting2, ZHANG Hanlu1, ZHAO Xuhui2, TANG Yuming2, ZUO Yu2
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1.No.92228, Chinese People's Liberation Army, Beijing 100072, China;2.School of Materials Science and Technology, Beijing University of Chemical Engineering, Beijing 100029, China
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| Abstract: |
| The types and the contents of antifouling agents have effects on the leaching mechanism and degradation process of antifouling coatings. With the hydrolysis of the resin and leaching of the antifouling agents, as the first shield, the failure of the antifouling coating have influences on the protection performance of the anticorrosion and antifouling coating systems on the substrate. The degradation processes of two Cu2O and organic antifouling agents contained antifouling coatings in 3.5% NaCl solution and the protection effect of the anticorrosion and antifouling coating systems on Al alloy substrate were studied by electrochemical impedance spectroscopy (EIS), SEM/EDS and Fourier transform infrared spectroscopy (FTIR) methods. Results show that, after immersed in 3.5% NaCl solution at room temperature for four years, the impedances at low frequency of the two coating systems still remain at high values and have well protection property for the substrate. Heat cycle tests (45 ℃12 h + 25 ℃12 h) accelerate the hydrolysis process of the coating in solution and the dissolution and release of some soluble pigments and fillers containing antifouling agents. Many micro-cracks are formed on the surface of W1 coating that contains high contents of Cu2O, hence the impedances at low frequency of the samples quickly decrease and the shelding property of the coating system decreases. While micro-cracks are seldom observed on the surface of the W2 antifouling coating that contains polysulfurcompounds therefore having good flexibility, so that the shelding property of the W2 coating system decreases slowly. |
| Key words: antifouling coating Cu2O polysulfur compound protection performance |
