Why do Fe–Al Alloys Show Good Passivation Behavior in Acids Compared to Elemental Al?
Why do Fe–Al Alloys Show Good Passivation Behavior in Acids Compared to Elemental Al?
复制标题
为什么铁铝合金比元素铝在酸中表现出良好的钝化行为？
DOI：
10.1149/1945-7111/acb972
复制
发表时间：
2023
影响因子：
3.9
通讯作者：
Sieradzki, Karl
中科院分区：
文献类型：
--
作者：
Bai, Qingguo;Sieradzki, Karl
我们提出了一些一般的概念，并提出问题连接到环境温度的钝化膜上形成的元素铝在酸与铁铝合金上含有小于约35-40原子%的铝形成的差异。数据表明，非保护性的氧化物，形成铝是不相关的杂质的影响，无论是在基体中或在晶界。我们认为，铝在单相固溶体合金中形成保护性钝化膜的能力与原子尺度尺寸效应有关，一旦铝浓度增加到约60at%，这种效应就会消失。
We present some general concepts and pose questions connected to the difference between the ambient temperature passive film formed on elemental aluminum in acid vs that which forms on iron-aluminum alloys containing less than about 35–40 at% Al. Data is presented which demonstrates that the non-protective oxide that forms on aluminum is not related to impurity effects, either in the matrix or in grain boundaries. We argue that the ability of aluminum to form a protective passive film in a single-phase solid solution alloy is connected to atomic-scale size effects that vanish once the aluminum concentration increases to about 60 at%.