Influence of artificial aging on corrosion of abraded Al-Zn-Mg-Cu alloys

被引：6

作者：

Wang, Shan-Shan ^{[1
]}

Huber, D. ^{[2
]}

Poplawsky, J. D. ^{[3
]}

Frankel, G. S. ^{[1
]}

机构：

[1] Ohio State Univ, Fontana Corros Ctr, Columbus, OH 43210 USA

[2] Ohio State Univ, Ctr Electron Microscopy & Anal, Columbus, OH 43210 USA

[3] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, POB 2009, Oak Ridge, TN 37831 USA

来源：

CORROSION SCIENCE | 2021年 / 191卷 / 191期

关键词：

Aluminum alloy; Subsurface; Microstructure; Polarization; Transmission electron microscopy; Atom probe tomography; ALTERED SURFACE-LAYER; MECHANICALLY POLISHED SURFACES; BINARY ALUMINUM-ALLOYS; FILIFORM CORROSION; HEAT-TREATMENT; 1ST BREAKDOWN; BEILBY LAYER; MICROSTRUCTURE; PRECIPITATION; DISSOLUTION;

D O I：

10.1016/j.corsci.2021.109745

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Surface abrasion has been shown to create altered surface layers (ASLs) that are hundreds of nm thick on all types of Al alloys. Such ASLs have lower corrosion resistance than the underlying substrate of Al-Zn-Mg-Cu alloys. Here, we demonstrate how heat treatments affect the ASL microstructure on abraded Al-Zn-Mg-Cu alloys using transmission electron microscopy and atom probe tomography, and also how the corrosion properties change using electrochemical polarization. High temperature treatments on the abraded bulk samples enhance eta phase precipitation in the ASL, leading to a decreased Zn content in the ASL solid solution, which ennobles the ASL breakdown potential.

引用

页数：8

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