Enhancing aluminum corrosion resistance by two-step anodizing process

被引：69
作者：
Bouchama, L. [1 ]
Azzouz, N. [1 ]
Boukrnouche, N. [1 ]
Chopart, J. P. [2 ]
Daltin, A. L. [2 ]
Bouznit, Y. [3 ]
机构：
[1] Jijel Univ, LIME, Jijel 18000, Algeria
[2] Univ Reims, Lab Mat Sci & Engn LISM, F-51100 Reims, France
[3] Jijel Univ, Lab Mat Elaborat Properties Applicat, Jijel 18000, Algeria
来源：
SURFACE & COATINGS TECHNOLOGY | 2013年 / 235卷
关键词：
Aluminum; Porous alumina; Single-step anodizing; Two-step anodizing; EIS spectroscopy; AC-IMPEDANCE MEASUREMENTS; METAL-MATRIX COMPOSITES; EIS CHARACTERIZATION; SEALING METHODS; SULFURIC-ACID; OXIDE LAYERS; FILMS; ALLOYS; PROTECTION; MECHANISM;
D O I：
10.1016/j.surfcoat.2013.08.046
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Two-step anodizing process can be seen as an effective way to form an adhesive and continued layer on aluminum to enhance its corrosion resistance. Anodic alumina was produced by two types of anodization process, namely single-step and two-step anodizing. We have then evaluated their protection effectiveness against aluminum corrosion in aggressive medium (NaCl 3%). In both cases, X-ray diffraction reveals an amorphous nature of porous oxide films. The electrochemical impedance spectroscopy (EIS) results revealed a strong correlation between the corrosion performance and the morphology of the development anodic films. Also, these results indicated that the morphology and the corrosion resistance of anodic film formed by two-step anodizing process are very improved if compared to single one. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：676 / 684
页数：9
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