Materials Reports  2022, Vol. 36 Issue (Z1): 22010030-5 |
| METALS AND METAL MATRIX COMPOSITES |
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| Effect of Organic Acid on Anodizing Film Structures and Corrosion Resistance of Novel Aluminum-Lithium Alloy |
| CHEN Xiaoli
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| College of Aeronautical Mechanical and Electrical Engineering, Chongqing Aerospace Polytechnic, Chongqing 400021, China |
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Abstract Compared with traditional aluminum alloys, the novel aluminum-lithium (Al-Li) alloys are widely used in the aerospace industry, to improve the payload and fuel efficiency of the aircraft, due to their low density, high specific strength and specific stiffness. However, the Al-Li alloys are prone to corrosion in humid environments. In industry, the corrosion resistance of aluminum alloys is usually improved through anodizing treatments. This work studied the effect of tartaric acid content on the structure and corrosion resistance of the anodic oxidation film, by adding 0 mol/L, 0.1 mol/L, 0.3 mol/L, 0.53 mol/L, 0.7 mol/L, and 0.9 mol/L tartaric acid into sulfuric acid solution. The corrosion resistance of the anodic films was investigated through electrochemical impedance spectroscopy (EIS) and neural salt spray test (NSST). The results show that tartaric acid did not change the formation mechanism of anodic oxide film, but reduced the dissolution rate of the film. The growth rate and thickness of anodic oxide film increased firstly and then decreased with the increase of tartaric acid concentration, and reached the maximum value when the amount of tartaric acid was 0.3 mol/L. Tartaric acid can reduce the capacitance of the oxide film barrier layer, increase the resistance of the barrier layer, and make it difficult for the aggressive ions to pass through the oxide film. However, no obvious correlation between the corrosion resistance of TSA film and the amount of tartaric acid has been found.
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Published: 05 June 2022
Online: 2022-06-08
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| Fund:Chongqing Municipal Education Commission(KJQN201903004). |
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1 陈小丽, 麻彦龙, 黄伟九, 等. 材料导报:综述篇, 2015, 29(4), 107.
2 麻彦龙, 孟晓敏, 黄伟九, 等. 中国有色金属学报, 2015, 25(3),7.
3 孙洁琼, 张宝柱.航空工程进展, 2013, 4(2), 158.
4 麻彦龙,陈小丽,易雅楠,等. 中国有色金属学报, 2016,26(10),2056.
5 Arenas M A, de Damborenea J J. Surface and Coatings Technology, 2004, 187(2), 320.
6 梁钊源, 麻彦龙, 朱彭舟, 等.重庆理工大学学报 (自然科学), 2020, 34(2), 100.
7 陈小丽. 铝锂合金酒石酸—硫酸阳极氧化膜的腐蚀行为及机理研究.硕士学位论文, 重庆理工大学,2016.
8 Ortiz J L, Carpio J J, Amigo V, et al.Journal of Materials Science Letters, 2001, 20(3), 197.
9 麻彦龙, 孟晓敏, 黄伟九, 等.中国有色金属学报, 2015, 25(3), 611.
10 Arenas M A, de Damborenea J J.Surface and Coatings Technology, 2004, 187(2), 320.
11 刘建华, 李永星, 于美, 等.中国有色金属学报, 2012(1), 324.
12 Deng S, Xu L, Li Q Z,et al. Advanced Materials Research, 2012, 399, 95.
13 Hakimizad A, Raeisii K, Ashrafizadeh F. Surface and Coatings Technology, 2012, 206(8), 2438.
14 Du N, Wang S X , Zhao Q, et al. Transactions of Nonferrous Metals Society of China, 2012, 22(7), 1655.
15 Kock E, Beneke M, Gerlach C. U S patent application, 2004.
16 Curioni M, Skeldon P, Thompson G E, et al.Advanced MAterials Research, 2008, 38, 48.
17 Curioni M, Skeldon P, Thompson G E, et al.Journal of the Electrochemical Society, 2009, 156(4), C147.
18 王正曦. 5182铝合金防腐表面处理研究.硕士学位论文, 重庆理工大学, 2018. |
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