|
|
|
| PREPARATION AND CHARACTERIZATION OF ORGANIC HYBRID FILMS ON THE SURFACE OF Al TUBES |
| LIANG Yonghuang 1,2, MAN Ruilin 1,2 |
1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083
2. Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, Central South University, Changsha 410083 |
|
Cite this article:
LIANG Yonghuang MAN Ruilin. PREPARATION AND CHARACTERIZATION OF ORGANIC HYBRID FILMS ON THE SURFACE OF Al TUBES. Acta Metall Sin, 2010, 46(12): 1522-1528.
|
|
|
Abstract Dense and hydrophobic organic hybrid films were deposited on the surface of aluminum tubes by the method of chemical immersion. Corrosion resistance of hybrid films was examined by bluestone drips, hydrogen evolution and copper accelerated salt spray tests, and the results show that the hybrid film significantly increases the corrosion resistance of aluminum tubes, with better protection than that of chromate passivation films. Tafel polarization curves and electrochemical impedance spectroscopy (EIS) were employed to investigate the electrochemical properties of hybrid films, the results indicate that the hybrid film greatly enhances the resistance of Al and reduces obviously the corrosion current density, which results in effective decrease to the corrosion rate of Al. Adhesion and bending experiments show that hybrid films have good adhesion and play a good performance on bending resistance. The surface structure and composition of hybrid films are analyzed using SEM, AFM and EDS. It is found that the surface of hybrid films, mainly consisting of Al, C, O, Si and P elements, is smooth, uniform and dense. The film surface is deposited a large number of amorphous solid granules with high coverage. Mechanism analysis of hybrid films’ formation and anticorrosion indicates that the reactions are taken place in the components of the organic hybrid passivation solution, synergistic passivation is carried out on the surface of aluminum tubes, and then uniform films are obtained, which effectively enhance the corrosion resistance of aluminum tubes.
|
|
Received: 30 May 2010
|
| Fund: Supported by Changsha Science and Technology Agency of Scientific Research under Contract (No.K0902110–11) |
| [1] 沈学明. 家用电冰箱铝蒸发器的内漏成因及对策[J]. 制冷与空调,2002,2(4):70-72[2] Seong-woo Woo, Dennis L. O’Neal, Michael Pecht. Failure analysis and redesign of the evaporator tubing in a Kimchi refrigerator[J]. Engineering Failure Analysis,2010,17(2): 369-379[3] 纪红,朱祖芳. 铝及铝合金无铬表面处理技术研究进展究[J]. 电镀与涂饰,2009,28(6): 34-36(39)[4] D. Zhu, W.J. van Ooij. Corrosion protection of AA 2024-T3 by bis-[3-(triethoxysilyl)propyl]tetrasulfide in neutral sodium chloride solution. Part 1: corrosion of AA 2024-T3[J]. Corrosion Science, 2003, 45(10):2163-2175[5] D. Zhu, W.J. van Ooij. Corrosion protection of AA 2024-T3 by bis-[3-(triethoxysilyl)propyl]tetrasulfide in sodium chloride solution: Part 2: mechanism for corrosion protection[J]. Corrosion Science, 2003,45(10):2177-2197[6] A. Seth, W.J. van Ooij, P. Puomi, et al. Novel, one-step, chromate-free coatings containing anticorrosion pigments for metals-An overview and mechanistic study[J]. Progress in Organic Coatings,2007,58(2-3):136-145[7] ?. Jovanovi?, J.B. Bajat, R.M. Jan?i?-Heinemann, et al. Methacryloxypropyltrimethoxysilane films on aluminium: Electrochemical characteristics, adhesion and morphology[J]. Progress in Organic Coatings, 2009,66(4):393-399.[8] Ji-Ming Hu, Liang Liu, Jian-Qing Zhang, et al. Effects of electrodeposition potential on the corrosion properties of bis-1,2-[triethoxysilyl]ethane films on aluminium alloy[J]. Electrochimica Acta,2006,51(19):3944–3949.[9] W. Xiao, R.L. Man, C. Miao, et al. Study on corrosion resistance of the BTESPT silane cooperating with rare earth cerium on the surface of aluminum tubes[J]. Journal of Rare Earths,2010,28(1):117-122[10] 满瑞林,徐斌,李兵等. 制冷设备中热交换用铝管在线钝化及其耐蚀性能[J]. 腐蚀科学与防护技术, 2008,20(1): 54-57[11] 李凌杰,欧孝通,陈德贤等. 改进溶胶-凝胶工艺制备铝合金硅基防护膜[J]. 腐蚀科学与防护技术,2009,21(2):197-199[12] 唐子龙,刘哲. LY12铝合金NaOH介质电解着色膜耐蚀性的电化学评价[J]. 中国腐蚀与防护学报,2010,30(1):25-28(34)[13] 李鑫庆,陈迪勤,余静琴. 化学转化膜技术与应用[M]. 北京: 机械工业出版社,2005.5[14] 曹楚南,张鉴清. 电化学阻抗谱导论[M]. 北京:科学出版社,2002.7[15] 胡吉明,张鉴清,曹楚南. 铝合金表面环氧涂层中水传输行为的电化学阻抗谱研究[J]. 金属学报, 2003,39(5):544-549[16] 胡吉明,刘倞, 张金涛等. 铝合金表面BTSE硅烷化处理研究[J]. 金属学报, 2004,40(11):1189-1194[17] 徐溢,唐守渊,陈立军. 反射吸收红外光谱法研究铝表面硅烷试剂膜的结构与性能[J]. 分析化学研究简报,2002,30(4):464-466)[18] 郭春伟. 烷基磷酸酯的合成及性能研究[D]. 无锡:江南大学,2005.3[19] 谢晶曦,常俊标,王绪明. 红外光谱在有机化学和药物化学中的应用[M]. 北京:科学出版社,2001[20] W.J. van Ooij, D. Zhu, M. Stacy, et al. Corrosion Protection Properties of Organofunctional Silanes-An Overview[J]. Tsinghua Science & Technology, 2005,10(6):639-664[21] 杜作栋,陈剑华. 有机硅化学[M].北京:高等教育出版社,1990.6[22] W.J. Van Ooij, T.Child. Protecting metals with silane coupling agents[J]. Chemtech,1998,28 (2):26-35. |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
