J. Mater. Sci. Technol. ›› 2010, Vol. 26 ›› Issue (2): 113-118.

• Research Articles • 上一篇    下一篇

Thick and dense anodic oxide layers formed on aluminum in sulphuric acid bath

W. Bensalah1;M. Feki2   

  1. 1. Ecole Nationale d'Ingénieurs de Sfax-Tunisia
    2. aUnité de recherche de Chimie Industrielle et Matériaux (URCIM). ENIS. B.P.W. Sfax Tunisie
  • 收稿日期:2008-09-25 修回日期:2009-05-11 出版日期:2010-02-28 发布日期:2010-02-28
  • 通讯作者: W. Bensalah

Thick and Dense Anodic Oxide Layers Formed on Aluminum in Sulphuric Acid Bath

W. Bensalah1), M. Feki1), M. Wery2), H.F. Ayedi1)   

  1. 1) URCIM, Department of Materials Engineering, National School of Engineering, ENIS. B.P.W. 1173-3038 Sfax, Tunisia
    2) IUT Orsay-Paris XI University, Plateau du Moulon, 91400 ORSAY, France
  • Received:2008-09-25 Revised:2009-05-11 Online:2010-02-28 Published:2010-02-28
  • Contact: W. Bensalah

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Abstract:

Thick and dense oxide layers were obtained on aluminium in sulphuric acid electrolyte. For this purpose, the methodology of experimental design was used. A three-variables Doehlert design (bath temperature, anodic current density, sulphuric acid concentration), was achieved. In order to maximize the growth rate and the density of the anodic oxide layer, optimum path study was conducted. Under the determined optimal anodizing conditions (5.7°C, 3 A·dm-2, Csul=140 g·L-1), the estimated response values were 0.86 μm·min-1 and 3.12 g·cm-2 for growth rate and density, respectively. The morphology of optimum layer was examined by scanning electron microscopy (SEM). The compactness of the optimum anodic layer can be correlated with its morphology revealed by SEM observations.

Key words: Sulphuric anodization, Experimental design, Growth rate, Density