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材料工程  2018, Vol. 46 Issue (9): 152-159    DOI: 10.11868/j.issn.1001-4381.2016.001446
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
应力载荷作用下5A06铝合金薄板材料在盐水中腐蚀行为
马慧媛1, 刘慧丛1, 石文静2, 施丽铭2, 李卫平1, 朱立群1
1. 北京航空航天大学 材料科学与工程学院, 北京 100191;
2. 北京空间飞行器总体设计部, 北京 100094
Corrosion Behaviors of 5A06 Aluminum Alloy Sheet Under Stress Loading in Brine Solution
MA Hui-yuan1, LIU Hui-cong1, SHI Wen-jing2, SHI Li-ming2, LI Wei-ping1, ZHU Li-qun1
1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China;
2. Beijing Institute of Spacecraft System Engineering, Beijing 100094, China
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摘要 以铝合金薄板在受载及盐水作用下可能存在的腐蚀加速问题为研究背景,用两点弯曲法探讨1.8mm厚5A06铝合金薄板在50℃的3.5% NaCl溶液中的腐蚀行为,研究发现施加载荷可以促进铝合金薄板材料的腐蚀。对不同腐蚀时期的裂纹形貌、金相组织以及元素成分等进行分析发现:在盐水环境中应力载荷对材料腐蚀的促进体现在与腐蚀程度成正比的关系,受铝合金材料内固溶强化相的影响,材料阳极区优先溶解,形成点蚀坑;另外,应力载荷会导致铝合金薄板表面氧化膜撕裂,并促使腐蚀裂纹扩展。
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马慧媛
刘慧丛
石文静
施丽铭
李卫平
朱立群
关键词 5A06铝合金薄板应力载荷盐水两点弯曲腐蚀行为    
Abstract:Based on the problem of corrosion acceleration possibly existing in aluminum alloy sheets under the influence of both loading and brine solution, the corrosion behavior of 5A06 aluminum alloy sheets with the thickness of 1.8mm by the two-point bending method in 3.5% NaCl aqueous solution at 50℃ was discussed.It is found that stress actually can promote the speed of corrosion in these aluminum alloy sheets.Crack morphologies, metallurgical structures and elemental compositions in different corrosion periods of these samples were analyzed.The results show:firstly, large stress will cause severe corrosion, which proves that stress can accelerate the corrosion; secondly, the solid solution strengthening phase in aluminum alloy can cause the anode areas preferentially dissolve, resulting in the formation of corrosion pits.Furthermore, stress can result in tearing of oxide film on the aluminum alloy surface, and facilitate corrosion crack propagation.
Key words5A06 aluminum alloy sheet    stress loading    brine solution    two-point bending    corrosion behavior
收稿日期: 2016-12-02      出版日期: 2018-09-19
中图分类号:  TG172.5  
通讯作者: 李卫平(1972-),女,教授,博士,从事腐蚀与防护以及功能涂层的研究,联系地址:北京市海淀区学院路37号北京航空航天大学材料科学与工程学院(100191),E-mail:liweiping@buaa.edu.cn     E-mail: liweiping@buaa.edu.cn;daizi8429@163.com
引用本文:   
马慧媛, 刘慧丛, 石文静, 施丽铭, 李卫平, 朱立群. 应力载荷作用下5A06铝合金薄板材料在盐水中腐蚀行为[J]. 材料工程, 2018, 46(9): 152-159.
MA Hui-yuan, LIU Hui-cong, SHI Wen-jing, SHI Li-ming, LI Wei-ping, ZHU Li-qun. Corrosion Behaviors of 5A06 Aluminum Alloy Sheet Under Stress Loading in Brine Solution. Journal of Materials Engineering, 2018, 46(9): 152-159.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.001446      或      http://jme.biam.ac.cn/CN/Y2018/V46/I9/152
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