Localized corrosion of a 2219 aluminium alloy exposed to a 3.5% NaCl solution

被引：130
|
作者：
Grilli, Rossana [1 ]
Baker, Mark A. [1 ]
Castle, James E. [1 ]
Dunn, Barrie [2 ]
Watts, John F. [1 ]
机构：
[1] Univ Surrey, Fac Engn & Phys Sci, Surface Anal Lab, Surrey GU2 7XH, England
[2] European Space Technol Ctr, NL-2200 AG Noordwijk, Netherlands
来源：
CORROSION SCIENCE | 2010年 / 52卷 / 09期
关键词：
Aluminium alloy; Intermetallics; AES; Corrosion; PITTING CORROSION; INITIATION; SPECTROSCOPY; 2024-T3;
D O I：
10.1016/j.corsci.2010.04.035
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This work is focused on the role of intermetallics in pitting corrosion of Al2219 alloy. Second phase particles were characterized by AES, SAM and EDX. Their behaviour in a solution of NaCl was investigated as a function of exposure time. The results confirmed the cathodic nature of the intermetallics with respect to the aluminium matrix. Corrosion products rich in aluminium and oxygen were found to progressively accumulate around the particles and iron was dissolved from the intermetallic, followed by back-deposition. Copper and manganese did not show any major activity. After 32 h of exposure the larger intermetallics were completely covered. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2855 / 2866
页数：12
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