| 乙酸钴的掺杂对LY12铝合金表面溶胶凝胶膜层耐蚀性的影响 |
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| 引用本文： | 丁娇娇,李松梅,刘建华,于美,詹中伟.乙酸钴的掺杂对LY12铝合金表面溶胶凝胶膜层耐蚀性的影响[J].航空学报,2011,32(6):1147-1155. |
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| 作者姓名： | 丁娇娇 李松梅 刘建华 于美 詹中伟 |
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| 作者单位： | 北京航空航天大学材料科学与工程学院,航空材料与服役教育部重点实验室,北京 100191 |
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| 摘 要： | 在LY12铝合金表面制备了防护性溶胶凝胶膜层,并研究了乙酸钴的掺杂对膜层耐蚀性能的影响.采用扫描电子显微镜(SEM)和电子能谱(EDS)分别观测溶胶凝胶膜层的微观结构和成分.采用电化学方法研究了乙酸钴浓度对溶胶膜层在浸泡实验中耐蚀性的影响；通过观察人为缺陷处在0.05 mol/L NaCl腐蚀溶液中形貌、成分的变化,对...
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| 关 键 词： | 乙酸钴 溶胶凝胶膜 耐蚀性能 浸泡 电化学阻抗谱 |
| 收稿时间： | 2010-10-19; |
Cobaltous Acetate Doped Sol-gel Coatings for Corrosion Protection on Aluminium Alloy LY12 |
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| DING Jiaojiao,LI Songmei,LIU Jianhua,YU Mei,ZHAN Zhongwei.Cobaltous Acetate Doped Sol-gel Coatings for Corrosion Protection on Aluminium Alloy LY12[J].Acta Aeronautica et Astronautica Sinica,2011,32(6):1147-1155. |
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| Authors: | DING Jiaojiao LI Songmei LIU Jianhua YU Mei ZHAN Zhongwei |
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| Institution: | Key Laboratory of Aerospace Materials and Performance,Ministry of Education,School of Materials Science and Engineering,Beihang University,Beijing 100191,China |
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| Abstract: | The aim of this study is to investigate the effect of cobaltous acetate doping on the corrosion resistance of sol-gel coatings on aluminium alloy LY12. The morphology and chemical composition of the coatings are investigated respectively by scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) are used to study the corrosion resistance mechanism of the coatings immersed in 0.05 mol/L NaCl solution. The results demonstrate that the doping of cobaltous acetate represented a remarkable improvement for the corrosion resistance of the coatings. In addition, the immersion test reveales that cobaltous acetate doping provided corrosion inhibition effect to the coatings. However, cobaltous acetate of relatively high concentration in sol-gel coatings might undermine both the stability and the corrosion resistance performance of the coatings after immersion. |
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| Keywords: | cobaltous acetate sol-gel coating corrosion inhibition immersion electrochemical impedance spectroscopy |
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