Abstract

Anodizing is a well-documented surface treatment that is inserted in a complex protection system against corrosion applied to Al alloys. In the scientific literature, there are many works about this topic, which are concentrated on: (1) anodic aluminum oxide (AAO) growth mechanism; (2) anodized alloys corrosion behavior, or (3) the influence of anodizing parameters on the following steps of corrosion protection of the anodized layer. However, the effect of the microstructure on the AAO formation is not yet well established. This paper aims to review the effect of the microstructure of Al and its alloys on the anodizing process by a historical, statistical, and electrochemical approach, considering the advantages in understanding the influence of intermetallics in this process. Besides, this review brings a comparison among the number of publications and the types of alloys studied by statistical analyses. Finally, it emphasizes the importance of anodizing in the aeronautical industry, in which a great number of studied alloys are applied, mainly the 2XXX (Al-Cu) and 7XXX (Al-Zn) series alloys.

摘要

阳极氧化是一种有据可查的表面处理方法，可插入复杂的铝合金腐蚀保护系统中。在科学文献中，有很多关于这一主题的著作，主要集中在：（1）阳极氧化铝（AAO）生长机制；（2）阳极氧化合金的腐蚀行为，或（3）阳极氧化参数对阳极氧化层后续腐蚀防护步骤的影响。然而，微观结构对 AAO 形成的影响尚未明确。本文旨在通过历史、统计和电化学方法回顾铝及其合金的微观结构对阳极氧化过程的影响，并考虑到理解金属间化合物在此过程中影响的优势。除了，本次审查通过统计分析对出版物数量和研究的合金类型进行了比较。最后强调了阳极氧化在航空工业中的重要性，航空工业中应用了大量研究的合金，主要是2XXX（Al-Cu）和7XXX（Al-Zn）系列合金。