Relationship between alloy composition, microstructure and exfoliation corrosion in Al-Zn-Mg-Cu alloys

被引：193
作者：
Marlaud, T. [1 ,2 ]
Malki, B. [1 ]
Henon, C. [2 ]
Deschamps, A. [1 ]
Baroux, B. [1 ]
机构：
[1] UFJ, Grenoble INP, CNRS, Lab Sci & Ingn Mat & Procedes SIMAP, F-38402 St Martin Dheres, France
[2] Ctr Rech Voreppe, Constellium CRV, F-38341 Voreppe, France
来源：
CORROSION SCIENCE | 2011年 / 53卷 / 10期
基金：
欧洲研究理事会;
关键词：
Aluminium; Galvanostatic; Exfoliation corrosion; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; INDUCED HYDROGEN EMBRITTLEMENT; INTERGRANULAR CORROSION; ALUMINUM-ALLOYS; LOCALIZED CORROSION; HEAT-TREATMENT; STRENGTH; CRACKING; STRESS; KINETICS;
D O I：
10.1016/j.corsci.2011.05.057
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The exfoliation corrosion (EFC) susceptibility of several 7000 Aluminium alloys has been studied after a variety of heat treatments using two independent corrosion tests (standard EXCO test and an electrochemical test based on potential transients analysis), together with detailed microstructural examinations. It is proposed that depending on heat treatment EFC may occur via two different mechanisms: inter-granular dissolution induced damage (IDD) or inter-granular fracture induced damage (IFD). The coexistence of these two mechanisms, leading to EFC, and their relative predominance explain the influence of alloy composition and heat treatment on EFC susceptibility via the confrontation of the two corrosion tests. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3139 / 3149
页数：11
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