Relationship between alloy composition, microstructure and exfoliation corrosion in Al-Zn-Mg-Cu alloys
Relationship between alloy composition, microstructure and exfoliation corrosion in Al-Zn-Mg-Cu alloys
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DOI：
10.1016/j.corsci.2011.05.057
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发表时间：
2011-10-01
影响因子：
8.3
通讯作者：
Baroux, B.
中科院分区：
文献类型：
--
作者：
Marlaud, T.;Malki, B.;Baroux, B.
采用两种独立的腐蚀试验（标准EXCO试验和基于电位瞬变分析的电化学试验）和详细的显微组织检查研究了几种7000铝合金在各种热处理后的剥落腐蚀（EFC）敏感性。根据热处理的不同，EFC可能通过两种不同的机制发生：晶间溶解诱导损伤（IDD）或晶间断裂诱导损伤（IFD）。导致EFC的这两种机制的共存及其相对优势解释了合金成分和热处理对EFC敏感性的影响，通过两种腐蚀试验的对抗。(C)2011爱思唯尔有限公司保留所有权利。
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.