Effect of Zr Addition on Localized Corrosion Behavior of Al-Zn-Mg Alloy

被引：0
|
作者：
Liu, S. D. [1 ,2 ,3 ]
Chai, W. R. [1 ,2 ,3 ]
Wang, Q. [1 ,2 ,3 ]
Pan, Q. L. [1 ,2 ,3 ]
Li, A. D. [4 ]
Deng, Y. L. [1 ,2 ,3 ]
Zhang, X. M. [1 ,2 ,3 ]
机构：
[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
[2] Minist Educ, Key Lab Nonferrous Met Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
[3] Nonferrous Met Oriented Adv Struct Mat & Mfg Coop, Changsha 410083, Hunan, Peoples R China
[4] Suntown Technol Grp Co Ltd, Changsha 410200, Hunan, Peoples R China
来源：
HIGH PERFORMANCE STRUCTURAL MATERIALS | 2018年
关键词：
Aluminium; Localized corrosion; Recrystallization; STEM; MECHANICAL-PROPERTIES; MICROSTRUCTURE; CRACKING; SC;
D O I：
10.1007/978-981-13-0104-9_26
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of Zr addition on localized corrosion resistance of Al-Zn-Mg alloy were investigated by means of intergranular corrosion (IGC) immersion and exfoliation corrosion (EXCO) immersion tests. The mechanism was discussed based on microstructural characterization by optical microscopy (OM) and scanning transmission electron microscopy (STEM). The results showed that Al-Zn-Mg-Zr alloy exhibited a smaller intergranular corrosion depth and exfoliation corrosion depth than Al-Zn-Mg alloy. Zr inhibited recrystallization and refines grains. The subgrain boundaries could retard the propagation of corrosion. Compared with Al-Zn-Mg alloy, Al-Zn-Mg-Zr alloy has lower Zn and Mg content of the grain boundary precipitates and narrower precipitate free zone near grain boundaries.
引用
收藏
页码：247 / 254
页数：8
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