Equivalent Relationship Model of Exfoliation Corrosion Damage for Aluminum Alloy in EXCO Solution and Coastal Atmospheric Environment
摘 要
为建立铝合金材料在沿海大气环境中的剥蚀损伤与实验室EXCO溶液加速剥蚀损伤之间的等效关系,在已有的万宁大气腐蚀研究基础上,对2A12-T4铝合金在EXCO溶液中的腐蚀特性开展了研究,对腐蚀过程中腐蚀液pH变化规律及不同腐蚀时间后试件最小剩余厚度分别进行了研究;在此基础上,讨论了2A12-T4铝合金在EXCO溶液中的腐蚀机理,建立了EXCO溶液与沿海大气环境中铝合金的剥蚀损伤等效关系模型;基于最小剩余厚度等效原则得到模型的具体参数值,模型的误差小于0.92%。
Abstract
In order to study the equivalent relationship of exfoliation corrosion damage of aluminum alloy in EXCO solution and in coastal atmospheric environment, the corrosion characteristics of 2A12-T4 aluminum alloy in EXCO solution were studied on the basis of the existing Wanning atmospheric corrosion researches. The change law of the solution pH value in corrosion process and the minimum residual thickness of the test plates after corrosion for different times were studied. On the basis of this, the corrosion mechanism of 2A12-T4 aluminum alloy in EXCO solution was discussed, and the equivalent relation model of exfoliation corrosion damage in EXCO solution and in Wanning atmospheric environment was established. Based on the equivalent principle of minimum residual thickness, the equivalent model parameters were obtained respectively, and the error of the model was less than 0.92%.
中图分类号 TG171 V252.2 DOI 10.11973/fsyfh-201604006
所属栏目 试验研究
基金项目 国家自然科学基金(51475470)
收稿日期 2015/11/25
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联系人作者何宇廷(029-84787082)
备注何宇廷(1966-),教授,博士,从事飞机结构强度与使用寿命的相关工作,
引用该论文: ZHANG Sheng,ZHANG Teng,HE Yu-ting,LI Chang-fan. Equivalent Relationship Model of Exfoliation Corrosion Damage for Aluminum Alloy in EXCO Solution and Coastal Atmospheric Environment[J]. Corrosion & Protection, 2016, 37(4): 294
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参考文献
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【3】张腾,何宇廷,高潮,等. 2A12-T4铝合金长期大气腐蚀损伤规律[J]. 航空学报,2015,36(2):661-671.
【4】陈跃良,金平,林典熊,等. 海军飞机结构腐蚀控制及强度评估[M]. 北京:国防工业出版社,2009.
【5】GONZALEZ J A,MORCILLO M,ESCUDERO E,et al. Atmospheric corrosion of bare and anodized aluminum in a wide range of environmental conditions[J]. Surface & Coatings Technology,2002,153(2/3):225.
【6】SUN S Q,ZHENG Q F,WEN J G. Long-term atmospheric corrosion behavior of aluminum alloys 2024 and 7075 in urban,coastal and industrial environments[J]. Corrosion Science,2009,51(4):719-727.
【7】WANG B B,WANG Z Y,HAN W,et al. Atmospheric corrosion of aluminum alloy 2024-T3 exposed to salt lake environment in western China[J]. Corrosion Science,2012,59(6):63-70.
【8】王振尧,李巧霞,汪川,等. LC4铝合金在格里木盐湖大气环境中的腐蚀行为[J]. 中国有色金属学报,2007,17(1):24-29.
【9】宋恩鹏,刘文珽,杨旭. 飞机内部腐蚀关键部位加速试验环境谱研究[J]. 航空学报,2006,27(4):646-649.
【10】刘文珽,李玉海,陈群志. 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):109-112.
【11】胡建军,陈跃良,卞贵学,等. 飞机结构加速腐蚀与自然腐蚀[J]. 腐蚀与防护,2011,32(11):900-904.
【12】刘文珽,蒋冬滨. 飞机结构关键危险部位加速腐蚀试验环境谱研究[J]. 航空学报,1998,19(4):434-438.
【13】MILLER R N,SCHUESSLER R L. Predicting service life of aircraft coating in various environments[J]. Corrosion,1989,45(4):17-21.
【14】ASTM G34-01Standard test method for exfoliation corrosion susceptibility in 2XXX and 7XXX series aluminum alloys (EXCO Test)[S].
【15】贺小帆,刘文珽,杨洪源. 铝合金加速腐蚀因子模型与分析[J]. 航空材料学报,2008,28(3):77-81.
【16】胡艳玲,李狄,郭宝兰. LY12CZ铝合金型材的腐蚀动力学统计规律研究及日历寿命预测方法探讨[J]. 航空学报,2000,21(增):53-27.
【17】谢伟杰,李狄,胡艳玲,等. LY12CZ和7075T7351铝合金在EXCO溶液中腐蚀动力学的统计研究[J]. 航空学报,1999,20(1):34-38.
【18】CAO F H,ZHANG Z,SU J X,et al. Electrochemical noise analysis of LY12-T3 in EXCO solution by discrete wavelet transform technique[J]. Electrochimica Acta,2006,51(7):1359-1364.
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【20】ZHANG T,HE Y T,CUI R H,et al. Long-term atmospheric corrosion of aluminum alloy 2024-T4 in a coastal environ-ment[J]. Journal of Materials Engineering and Performance,2015,24(7):2764-2773.
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