Electro-chemo-mechanical properties of anodic oxide (passive) films formed on Cu, Ni and Fe

IF 2.7 4区 材料科学 Q3 ELECTROCHEMISTRY Corrosion Reviews Pub Date : 2023-12-04 DOI:10.1515/corrrev-2023-0073
Masahiro Seo
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Abstract

Abstract Electro-chemo-mechanical properties of anodic oxide (passive) films formed on metals have been reviewed focusing on the results of stress variations caused by anodic oxidation of Cu, Ni, and Fe thin film electrodes in deaerated pH 8.4 borate buffer solution at 25 °C. The surface stress varies toward compressive direction due to adsorption of OH on Cu from aqueous solution as well as adsorption of oxygen on metals from gas phase. The stresses are generated with the growth of three-dimensional anodic oxide films on metals. The magnitude and sign (tensile or compressive) of the intrinsic film stress were determined by taking the residual stress of the substrate and the dielectrostriction into consideration. The tensile or compressive intrinsic film stress depends on p-type or n-type semiconductive properties of the anodic oxide films, which is explained in terms of the void formation or oxide formation in the metal side at the metal/film interface. Furthermore, the stress variation toward compressive direction during cathodic reduction of the anodic oxide films is explained in terms of the volume expansion due to the formation of intermediate species.
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在铜、镍和铁上形成的阳极氧化物(被动)薄膜的电化学机械特性
摘要:本文综述了金属表面阳极氧化(钝化)膜的电化学力学性能,重点研究了Cu、Ni和Fe薄膜电极在pH 8.4硼酸盐过氧缓冲溶液中在25 °C下阳极氧化引起的应力变化。由于水溶液中OH在Cu上的吸附和气相中氧在金属上的吸附,表面应力向压缩方向变化。应力是随着金属表面三维阳极氧化膜的生长而产生的。薄膜本征应力的大小和符号(拉伸或压缩)是通过考虑衬底的残余应力和介电拉伸来确定的。薄膜的拉伸或压缩本征应力取决于阳极氧化膜的p型或n型半导体特性,这可以用金属/薄膜界面上金属侧的空洞形成或氧化物形成来解释。此外,在阳极氧化膜的阴极还原过程中,应力向压缩方向的变化可以用中间物质的形成引起的体积膨胀来解释。
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来源期刊
Corrosion Reviews
Corrosion Reviews 工程技术-材料科学:膜
CiteScore
5.20
自引率
3.10%
发文量
44
审稿时长
4.5 months
期刊介绍: Corrosion Reviews is an international bimonthly journal devoted to critical reviews and, to a lesser extent, outstanding original articles that are key to advancing the understanding and application of corrosion science and engineering in the service of society. Papers may be of a theoretical, experimental or practical nature, provided that they make a significant contribution to knowledge in the field.
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