Impact of Corrosion on the Degradation of the Mechanical Properties of 2195 and 2297 Al Alloys in the Marine Environment

被引:9
作者
Wu, Hulin [1 ]
Wu, Guang [2 ]
Xiang, Lin [1 ]
Tao, Jianquan [1 ]
Zheng, Zhongyan [1 ]
Sun, Jipeng [1 ]
Li, Wei [3 ]
Huang, Chunyang [2 ,3 ]
Lan, Xuke [2 ,3 ]
机构
[1] Precis Forming Ctr, Southwest Technol & Engn Res Inst, Chongqing 400039, Peoples R China
[2] Chongqing Innovat Ctr, Intelligent Protect Res Lab, Beijing Inst Technol, Chongqing 401120, Peoples R China
[3] Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100036, Peoples R China
基金
中国国家自然科学基金;
关键词
aluminum alloys; 2195-T8; 2297-T8; marine environment; mechanical properties; ATMOSPHERIC CORROSION; PITTING CORROSION; MICROSTRUCTURE; EVOLUTION; BEHAVIOR;
D O I
10.3390/met12081371
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The objective of this work was to study the corrosion behavior of 2xxx aluminum alloys in the marine environment and the degradation of mechanical properties caused by corrosion as well as to provide support for the lightweight design of marine equipment. The corrosion characteristics of 2297-T8 and 2195-T8 were observed by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) at 3, 6, 9, and 12 months of exposure, and the mechanical properties were obtained via uniaxial tensile testing. The results of the study showed the following: (1) With an increase in the exposure time, the corrosion products on the surface of 2297-T8 gradually increase, and the corrosion products on the surface of 2195-T8 accumulate rapidly. (2) The results of EDS show that the corrosion products of 2297 are mainly Al oxides and that those of 2195 are composed of Al, Fe, Mn, Si, etc. (3) Through the corrosion pit diameter, corrosion pit depth, and corrosion mass reduction rate surface, the trend of an increasing average radius of the corrosion pits and the corrosion mass reduction rate surface varies linearly, and the average depth of the corrosion pits increases dramatically after 9 months of exposure time. (4) According to the mechanical properties of the study surface, in a marine atmosphere, the degradation of 2297-T8 ductility is higher than that of 2195-T8, while the degradation of the yield stress is lower than that of 2195-T8.
引用
收藏
页数:11
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