[1]麻彦龙.非均匀微观组织对AA2099-T8新型铝锂合金及其阳极氧化膜耐腐蚀性能的影响[J].中国材料进展,2015,(12):050-55.[doi:10.7502/j.issn.1674-3962.2015.12.10]
　MA Yanlong.Effect of Heterogeneous Microstructure on Corrosion Resistance of AA2099-T8 Aluminum-Lithium Alloy and Its Anodic Films[J].MATERIALS CHINA,2015,(12):050-55.[doi:10.7502/j.issn.1674-3962.2015.12.10]
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非均匀微观组织对AA2099-T8新型铝锂合金及其阳极氧化膜耐腐蚀性能的影响()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期数:
2015年第12期
页码:
050-55
栏目:
特约研究论文
出版日期:
2015-12-25

文章信息/Info

Title:
Effect of Heterogeneous Microstructure on Corrosion Resistance of AA2099-T8 Aluminum-Lithium Alloy and Its Anodic Films
作者:
麻彦龙
重庆理工大学材料科学与工程学院  重庆市模具技术重点实验室
Author(s):
 MA Yanlong
Chongqing Municipal Engineering Research Center for Mould Technology ，School of Materials Science and Engineering，Chongqing University of Technology
关键词:
铝锂合金; 微观组织; 局部腐蚀; 阳极氧化
DOI:
10.7502/j.issn.1674-3962.2015.12.10
文献标志码:
A
摘要:
围绕AA2099-T8合金，全面综述了第三代新型铝锂合金在微观组织、腐蚀行为及阳极氧化等方面取得的最新研究进展，重点分析了该合金的微观组织对合金阳极氧化前后耐腐蚀性能的影响。研究发现：在3.5%NaCl溶液中，AA2099-T8合金上发生了亚稳态局部腐蚀和严重局部腐蚀两类腐蚀，前者主要由Al-Fe-Mn-Cu-(Li)第二相颗粒引起，后者则与热机械加工过程中的局部塑性变形及T1(Al2CuLi)相的非均匀析出有关。在酒石酸-硫酸阳极氧化（TSA）条件下，Al-Fe-Mn-Cu-(Li)第二相颗粒的阳极氧化行为明显不同于铝合金基体，破坏了阳极氧化膜的连续性，对阳极氧化处理合金的耐腐蚀性能产生不利影响。
Abstract:
State-of-the-art research progress on microstructure，corrosion resistance and anodizing behavior of the third generation aluminum-lithium alloys has been reviewed，with particular focus on the effect of microstructure on corrosion resistance of the new-type aluminum-lithium alloy AA2099-T8 before and after anodizing. It was found that two types of localized corrosion occurred in the alloy in 3.5% NaCl solution， namely metastable localized corrosion and severe localized corrosion. The metastable localized corrosion is ascribed to Al-Fe-Mn-Cu-(Li) constituent particles while the severe localized corrosion is associated with localized plastic deformation and heterogeneous precipitation of the T1(Al2CuLi) phase. During tartaric-sulphuric acid anodizing (TSA)，the Al-Fe-Mn-Cu-(Li) constituent particles behaved differently compared with the alloy matrix，leading to the formation of discontinuities in the anodic film，which deteriorates the corrosion resistance of the anodized alloy.
更新日期/Last Update: 2015-12-29