Metallurgical aspects of the corrosion resistance of 7000 series aluminum alloys – a review

IF 1.3 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science-Poland Pub Date : 2024-03-02 DOI:10.2478/msp-2023-0041

Marzena Małgorzata Lachowicz

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Abstract

This article contains a review of selected studies conducted in the field of corrosion resistance of precipitation-hardenable 7000 series aluminum alloys. In particular, it discusses the effect of heat treatment and the role of thus formed microstructure on the corrosion behavior of these alloys. The article presents the three types of corrosion that occur most commonly in this group of materials in the context of their microstructure. It points to the importance of the chemical composition of a 7000 alloy, including the precipitates present in the microstructure, for the development of corrosion. The aluminum solid solution can act as an anode or cathode in relation to intermetallic particles. Such corrosion features may result in the destruction of the surfaces of elements made of the 7000 series aluminum alloy. It also raises the issue of the mechanism of corrosive destruction of the aluminum solid solution, which is connected with a crystallographic attack. In the case of this process, the nature of the micro-pits formed as a result of their local dissolution is related to the privileged dissolution of specific crystallographic planes and directions.

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7000 系列铝合金耐腐蚀性的冶金学方面--综述

本文综述了在可沉淀硬化的 7000 系列铝合金耐腐蚀性领域开展的部分研究。文章特别讨论了热处理的影响以及由此形成的微观结构对这些合金腐蚀行为的作用。文章结合材料的微观结构，介绍了这类材料中最常见的三种腐蚀类型。文章指出了 7000 合金的化学成分（包括微观结构中存在的沉淀物）对腐蚀发展的重要性。铝固溶体可作为金属间颗粒的阳极或阴极。这种腐蚀特征可能会导致 7000 系列铝合金元件表面的破坏。这也提出了铝固溶体的腐蚀破坏机制问题，它与结晶侵蚀有关。在这一过程中，由于局部溶解而形成的微坑的性质与特定结晶平面和方向的优先溶解有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Science-Poland MATERIALS SCIENCE, MULTIDISCIPLINARY-

自引率

18.20%

发文量

期刊介绍： Material Sciences-Poland is an interdisciplinary journal devoted to experimental research into results on the relationships between structure, processing, properties, technology, and uses of materials. Original research articles and review can be only submitted.