Intergranular corrosion of Zn-free and Zn-microalloyed Al-xCu-yLi alloys

被引：59
作者：
Li, J. F. [1 ]
Birbilis, N. [2 ]
Liu, D. Y. [1 ]
Chen, Y. L. [3 ]
Zhang, X. H. [3 ]
Cai, C. [4 ]
机构：
[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
[2] Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia
[3] Aerosp Res Inst Mat & Proc, Beijing 100076, Peoples R China
[4] Ningxia Univ, Sch Chem & Chem Engn, Yinchuan 750001, Peoples R China
来源：
CORROSION SCIENCE | 2016年 / 105卷
关键词：
Alloy; Aluminium; Polarization; TEM; Intergranular corrosion; LOCALIZED CORROSION; ELECTROCHEMICAL-BEHAVIOR; MECHANISM; MICROSTRUCTURE; CRACKING; SUSCEPTIBILITY; EVOLUTION; AEROSPACE; PROPERTY; TEXTURE;
D O I：
10.1016/j.corsci.2016.01.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of 0.42 and 0.72 wt.% Zn on the intergranular corrosion (IGC) of Al-3.7Cu-1.15Li-0.5Mg and Al-2.7Cu-1.7Li-0.3Mg alloys (representing different Cu/Li ratios) was investigated. IGC dependence on ageing time was studied and a primitive IGC diagram established. With ageing, the potential of the Al-xCu-yLi alloys lowered due to precipitation, accompanied by grain boundary precipitate coarsening. Concomitantly, corrosion mode evolved with ageing from pitting and local IGC (early ageing), general IGC (under-aged), local IGC (near peak-aged) and pitting (over-aged). Of key interest is that Zn additions remarkably decreased the IGC sensitivity of the Al-2.7Cu-1.7Li-0.3Mg. (C) 2016 Elsevier Ltd. All rights reserved.
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页码：44 / 57
页数：14
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