[1]杨 浪,赵起越,贺 建,等.6061铝合金在模拟工业-海洋大气环境下的腐蚀研究[J].中国材料进展,2018,(01):028-34.[doi:10.7502/j.issn.1674-3962.2018.01.05]
　YANG Lang,ZHAO Qiyue,HE Jian,et al.Corrosion Behavior of 6061 Aluminum Alloy in Simulative Industry-marine Atmospheric Environment[J].MATERIALS CHINA,2018,(01):028-34.[doi:10.7502/j.issn.1674-3962.2018.01.05]
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6061铝合金在模拟工业-海洋大气环境下的腐蚀研究()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期数:
2018年第01期
页码:
028-34
栏目:
特约研究论文
出版日期:
2018-01-31

文章信息/Info

Title:
Corrosion Behavior of 6061 Aluminum Alloy in Simulative Industry-marine Atmospheric Environment
作者:
杨  浪;  赵起越;  贺  建;  李晓刚;  黄运华
（1.北京科技大学腐蚀与防护中心，北京 100083）（2.中国计量科学研究院，北京 100013）
Author(s):
YANG Lang1; ZHAO Qiyue1; HE Jian2; LI Xiaogang1; HUANG Yunhua1
（1.Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China)（2.National Institute of Metrology China, Beijing 100013, China)
关键词:
6061铝合金; 工业海洋大气; 沿晶腐蚀; 点蚀; 室内加速腐蚀
Keywords:
6061 aluminum alloy;  industry-marine atmospheric environment;  intergranular corrosion;  pitting corrosion;  indoor accelerated corrosion
DOI:
10.7502/j.issn.1674-3962.2018.01.05
文献标志码:
A
摘要:
通过紫外辐射老化实验和周期浸润实验，利用腐蚀表面和截面形貌分析、力学性能测试及拉伸断口扫描分析等，研究了6061铝合金在模拟工业-海洋大气环境下的腐蚀行为及机理。腐蚀形貌观察发现，6061铝合金在该环境下的腐蚀由点蚀引起并扩展，同时，试样发生沿晶腐蚀，8周期后沿晶腐蚀裂纹扩展深度达80 μm。模拟工业-海洋大气环境中的硫化物不仅对试样表面的点蚀产生很大影响，而且硫酸根离子会随着腐蚀介质深入晶界，加速沿晶腐蚀。力学性能分析表明，在该环境下腐蚀8个周期后，试样的延伸率大幅下降，下降率达26%，断裂机理发生改变，点蚀和沿晶腐蚀导致6061铝合金从韧性断裂转变为解理脆性断裂。
Abstract:
The corrosion behavior and mechanism of 6061 aluminum alloy in simulated industrial-marine atmospheric environment were studied by means of UV radiation aging and cyclic wet-dry experiment, and the analyses of corrosion morphology of surface and cross section, mechanical property and tensile fracture. The morphology observation showed that the corrosion of 6061 aluminum alloy in this environment was initiated by pitting corrosion, the intergranular corrosion occurred and aggravated with the time increased, and the deepest crack of intergranular corrosion reached 80 μm in the end of eighth experiment cycles. The sulfide in the simulated industry-marine environment not only had a great impact on the pitting of the surface, but also the sulfite ions penetrated into the grain boundary with the corrosive medium and promoted the intergranular corrosion. The analysis of mechanical properties showed that the elongation rate of the specimens reduced by 26% after 8 cycles of experiment in this environment, and the corresponding mechanism changed from ductile fracture to cleavage fragile fracture caused by pitting and intergranular corrosion.
更新日期/Last Update: 2017-12-28