PDF(Pubmed)
Abstract：
Aluminum technical alloys are well known for their outstanding mechanical properties, especially after heat treatment. However, quenching and aging, which improve the mechanical properties, by the formation of Cu-rich zones and phases that are coherent with the matrix and block the dislocation motion, cause uneven distribution of the elements in the alloy and consequently make it prone to corrosion. One method providing satisfactory corrosion protection of aluminum alloys is anodizing. On an industrial scale, it is usually carried out in electrolytes containing chromates that were found to be cancerogenic and toxic. Therefore, much effort has been undertaken to find substitutions. Currently, there are many Cr(VI)-free substitutes like tartaric-sulfuric acid anodizing or citric-sulfuric acid anodizing. Despite using such approaches even on the industrial scale, Cr(VI)-based anodizing still seems to be superior; therefore, there is an urge to find more complex but more effective approaches in anodizing. The incorporation of anions into anodic alumina from the electrolytes is a commonly known effect. Researchers used this phenomenon to entrap various other anions and organic compounds into anodic alumina to change their properties. In this review paper, the impact of the incorporation of various corrosion inhibitors into anodic alumina on the corrosion performance of the alloys is discussed. It is shown that Mo compounds are promising, especially when combined with organic acids.
摘要：
铝技术合金以其出色的机械性能而闻名，特别是热处理后。然而,淬火和时效，提高了机械性能，通过形成与基体相干并阻止位错运动的富Cu区和相，导致元素在合金中的不均匀分布，从而使其易于腐蚀。一种提供令人满意的铝合金腐蚀保护的方法是阳极氧化。在工业规模上，它通常在含有铬酸盐的电解质中进行，这些铬酸盐被发现具有致癌作用和毒性。因此,已经付出了很多努力来寻找替代品。目前,有许多无Cr（VI）的替代品，如酒石酸-硫酸阳极氧化或柠檬酸-硫酸阳极氧化。尽管即使在工业规模上也使用了这种方法，Cr（VI）基阳极氧化似乎仍然是优越的；因此，有一种冲动，以寻找更复杂但更有效的方法在阳极氧化。从电解质向阳极氧化铝中引入阴离子是公知的效应。研究人员利用这种现象将各种其他阴离子和有机化合物截留到阳极氧化铝中以改变它们的性质。在这篇综述论文中，讨论了在阳极氧化铝中掺入各种缓蚀剂对合金腐蚀性能的影响。表明Mo化合物是有前途的，尤其是与有机酸结合时。
