Effects of alloying elements in anodizing of aluminium
Effects of alloying elements in anodizing of aluminium
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DOI：
10.1080/00202967.1997.11871137
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发表时间：
1997-01-01
影响因子：
1.9
通讯作者：
Zhou, X
中科院分区：
文献类型：
--
作者：
Habazaki, H;Shimizu, K;Zhou, X
参考作者最近在模型二元铝合金阳极氧化方面的研究成果，对铝合金的阳极氧化进行了综述和讨论。本文主要关注的是在势垒型阳极膜形成过程中合金元素在合金/膜界面处的氧化。然而，这些发现也被认为适用于多孔阳极膜的形成。结果表明，铝合金阳极氧化后，1 ~ 5 nm厚度的合金层富集现象较为普遍。在阳极膜下面的合金中存在的富集是在合金上形成阳极膜的直接结果。强调了合金成分对合金中合金元素富集的影响，并与形成合金元素氧化物的每当量吉布斯自由能相关联。富合金层的发展并不局限于阳极氧化，还可以在化学抛光、电抛光和碱性蚀刻等其他表面处理后发现。
The anodic oxidation of aluminium alloys is reviewed and discussed with reference to recent results of the authors on the anodizing of model binary aluminium alloys. Attention is given primarily to the oxidation of alloying elements at the alloy/film interface during the formation of barrier-type anodic films. However, the findings are also considered to be applicable to the formation of porous anodic films. The enrichments of alloy layers of about 1-5 nm thickness is revealed to be a relatively common occurrence following anodizing of aluminium alloys. The enrichments, present in the alloy just beneath the anodic film, are a direct consequence of the formation of the anodic film on the alloy. The influence of alloy composition on the enrichments of the alloying element within the alloy is highlighted, and correlated with the Gibbs free energy per equivalent for formation of the alloying element oxide. The development of enriched alloy layers is not confined to anodizing and is found following other surface treatments including chemical polishing, electropolishing and alkaline etching.