Abstract: The present work aims to explore the dual-factor synergistic effect of Cl- and H+ concentrations. We obtained the polarization curve, open circuit potential and micro morphology of 2024-T3 aluminum alloy in aqueous solution with different Cl- and H+ concentrations by means of electrochemical workstation, optical microscopy and scanning electron microscopy. A mathematical model was established for the analysis of dual-factor synergistic effect, and the main effect, synergistic effect and simple effect of Cl- and H+ concentrations on the alloy’s corrosion rate in the initial stage were quantified. We observed a corrosion acceleration but an unchanged apparent corrosion morphology while increased Cl- and H+ concentrations. It can be concluded that, the main effect and synergistic effect of Cl- and H+ concentrations on the corrosion rate are significant with the confidence level of 0.005, and the order from main to subordinate is H+, Cl- and H+×Cl-, and also there are significant differences between the simple effects of the two factors. In the initial stage, Cl- and H+ affect the corrosion behavior of aluminum alloy by changing the passive film properties. Under different concentration levels, the disintegration of the passive film is dominated by distinct reactions: the dissolution damage under high H+ concentration and the synergistic destruction of Cl- and H+ under low H+ concentration.
1 Luo Chen, Li Ming, Sun Zhihua, et al. Environmental damage and environmental adaptability of the aircraft in marine atmosphere[J].Journal of Aeronautical Materials,2016,36(3):101(in Chinese). 骆晨,李明,孙志华,等.海洋大气环境中飞机的环境损伤和环境适应性[J].航空材料学报,2016,36(3):101. 2 Liu Wenting, Li Yuhai, Chen Qunzhi, et al. Accelerated corrosion environmental spectrums for testing surface coatings of critical areas of flight aircraft structures[J].Journal of Beijing University of Aeronautics and Astronautics,2002,28(1):109(in Chinese). 刘文珽,李玉海,陈群志,等.飞机结构腐蚀部位涂层加速试验环境谱研究[J].北京航空航天大学学报,2002,28(1):109. 3 Wang Chiquan, Xiong Junjiang, Ma Shaojun, et al. Tests for corrosion crack propagation behavior of aeronautical aluminum alloys[J].Journal of Beijing University of Aeronautics and Astronautics,2017,43(5):935(in Chinese). 王池权,熊峻江,马少俊,等.航空铝合金材料腐蚀裂纹扩展性能试验[J].北京航空航天大学学报,2017,43(5):935. 4 Liu Yanjie, Wang Zhenyao, Ke Wei. Corrosion behavior of 2024-T3 aluminum alloy in simulated marine atmospheric environment[J].The Chinese Journal of Nonferrous Metals,2013,21(5):1208(in Chinese). 刘艳洁,王振尧,柯伟.2024-T3铝合金在模拟海洋大气环境中的腐蚀行为[J].中国有色金属学报,2013,21(5):1208. 5 Zhang J, Hu J, Cao C. Electrochemical behaviors of corrosion of LY12 aluminum alloy/passivation film/epoxy coatings composite electrodes[J].Acta Metallurgica Sinica,2006,42(5):528. 6 Shahidi M, Gholamhosseinzadeh M R. Electrochemical evaluation of AA6061 aluminum alloy corroion in citric acid solution without and with chloride ions[J].Journal of Electroanalytical Chemistry,2015,45(757):8. 7 Donatus U, Thompson G E,Elabar D, et al. Features in aluminum alloy grains and their effects on anodizing and corrosion[J].Surface & Coatings Technology,2015,277(3):91. 8 Bi Xinmin, Cao Chunan. Effects of pH and chloride concentration on electrochemical corrosion behavior of iron in acid solution[J].Journal of Chinese Society of Corrosion and Protection,1983,3(4):199(in Chinese). 毕新民,曹楚南.pH值和氯离子浓度对铁在酸溶液中的腐蚀电化学行为的影响[J].中国腐蚀与防护学报,1983,3(4):199. 9 Dong Junhua, Cao Chunan, Lin Haichao. The mechanism research of corrosive promotion of H+ and Cl- on iron[J].Corrosion Science and Protection Technology,1995,24(4):293(in Chinese). 董俊华,曹楚南,林海潮.酸度和氯离子浓度对工业纯铁腐蚀的促进作用机制研究[J].腐蚀科学与防护技术,1995,24(4):293. 10 Yang Q, Luo J L. Hydrogen-enhanced effects of chloride ions on the passivity of type 304 stainless steel[J].Electrochimica Acta,2000,45(24):3927. 11 Qu Qing, Yan Chuanwei, Cao Chunan. Atmospheric corrosion of NaCl contaminated A3 steel in air containing SO2[J].Corrosion Science and Protection Technology,2001,13(z1):432(in Chinese). 屈庆,严川伟,曹楚南.NaCl污染的A3钢在含SO2的大气环境中的腐蚀[J].腐蚀科学与防护技术,2001,13(z1):432. 12 Qu Qing, Yan Chuanwei, Zhang Lei, et al. Synergism of NaCl and SO2 in the initial atmospheric corrosion of A3 steel[J].Acta Metallurgica Sinica,2002,38(10):1062(in Chinese). 屈庆,严川伟,张蕾,等.NaCl和SO2在A3钢初期大气腐蚀中的协同效应[J].金属学报,2002,38(10):1062. 13 Qu Qing, Yan Chuanwei, Zhang Lei, et al. Synergism of NaCl and SO2 in initial atmospheric corrosion of Zn[J].The Chinese Journal of Nonferrous Metals,2002,12(6):1272(in Chinese). 屈庆,严川伟,张蕾,等.Zn初期大气腐蚀中NaCl和SO2的协同效应[J].中国有色金属学报,2002,12(6):1272. 14 Li Dangguo, Feng Yaorong, Bai Zhenquan, et al. Influence of temperature, pH value and chloride ion on the diffusity of point defect in the passive film on X80 pipeline steel[J].Acta Chimica Sinica,2008,66(10):1151(in Chinese). 李党国,冯耀荣,白真权,等.温度、pH值和氯离子对X80钢钝化膜内点缺陷扩散系数的影响[J].化学学报,2008,66(10):1151. 15 Zhang Zhen, Liang Yuwu. Corrosion behavior of iron in sodium chloride solutions with different pH value[J].Corrosion Science and Protection Technology,2008,20(4):260(in Chinese). 张震,梁煜武.铁在不同pH值的NaCl溶液中的腐蚀行为[J].腐蚀科学与防护技术,2008,20(4):260. 16 Wang Fengping, Zhang Xueyuan. Synergistic effect of NaCl and CO2 on atmospheric corrosion of Zinc under thin electrolyte film[J].Acta Metallurgica Sinica,2000,36(9):970(in Chinese). 王凤平,张学元.NaCl和CO2对Zn在薄液膜下腐蚀的协同作用[J].金属学报,2000,36(9):970. 17 He Junguang, Wen Jiuba, Sun Lemin, et al. Characterization of pitting behavior of pure Al and Al-7Zn-0.1Sn-0.015Ga alloy by cyclic polarization technique[J].Corrosion Science and Protection Techno-logy,2015,27(5):449(in Chinese). 贺俊光,文九巴,孙乐民,等.用循环极化曲线研究Al和铝合金的点蚀行为[J].腐蚀科学与防护技术,2015,27(5):449. 18 Chen Yueliang, Wang Zhefu, Bian Guixue, et al. Equivalent conversion of galvanic corrosion of typical aluminum-titanium alloy in NaCl solution with different concentrations[J].Acta Aeronautica et Astronautica Sinica,2017,38(3):420(in Chinese). (下转第1563页) 陈跃良,王哲夫,卞贵学,等.不同浓度NaCl溶液下典型铝/钛合金电偶腐蚀当量折算关系[J].航空学报,2017,38(3):420. 19 中国钢铁工业协会委员会.GB/T 16545-2015金属和合金铁腐蚀——腐蚀试样上腐蚀产物的清除[S].北京:中国标准出版社,2016:5. 20 Augustin C, Andrieu E, Baret-Blanc C, et al. Empirical propagation laws of intergranular corrosion defects affecting 2024 T351 alloy in chloride solutions[J].Journal of the Electrochemical Society,2010,157(12):C428. 21 Luo C, Albu S P, Zhou X, et al. Continuous and discontinuous loca-lized corrosion of a 2xxx aluminium-copper-lithium alloy in sodium chloride solution[J].Journal of Alloys & Compounds,2016,658(54):61. 22 曹楚南.腐蚀电化学原理(第三版)[M].北京:化学工业出版社,2008:99. 23 Donatus U, Thompson G E, Omotoyinbo J A, et al. Corrosion pathways in aluminum alloys[J].Transactions of Nonferrous Metals Society of China,2017,27(1):55. 24 Harrar S W, Bathke A C. A modified two-factor multivariate analysis of variance: Asymptotics and small sample approximations[J].Annals of the Institute of Statistical Mathematics,2012,64(5):1087. 25 孙荣恒.应用数理统计[M].北京:科学出版社,2014. 26 Fan Xiaoli, Zhou Qianxiang, Liu Zhongqi, et al. Principle of plane display interface design based on visual search[J].Journal of Beijing University of Aeronautics and Astronautics,2015,24(2):216(in Chinese). 范晓丽,周前祥,柳忠起,等.基于视觉搜索的飞机显示界面设计原则[J].北京航空航天大学学报,2015,24(2):216. 27 Hughes A E, Hinton B, Furman S A, et al. Airlife-towards a fleet management tool for corrosion damage[J].Corrosion Reviews,2011,25(3-4):275. 28 Yang Q, Luo J L. Hydrogen-enhanced effects of chloride ions on the passivity of type 304 stainless steel [J].Electrochimica Acta,2000,45(24):3927. 29 Foley R T. Localized corrosion of aluminum alloys—A review[J].Corrosion,1986,42(5):277.
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2018, Vol. 32 
