Journal ArticleDOI
Structural Features of Oxide Coatings on Aluminum
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In this paper, the structural features of the porous type of anodic oxide coating applied to aluminum have been investigated with the electron microscope, and formulas were given for calculating the cell size and pore volume of these coatings.Abstract:
The structural features of the porous type of anodic oxide coating applied to aluminum have been investigated with the electron microscope. These coatings consist of close‐packed cells of oxide, predominately hexagonal in shape, each of which contains a single pore. Pore size is a function of the electrolyte used and is independent of forming voltage. Wall thickness and barrier thickness are primarily a function of forming voltage and are affected to a minor degree by the electrolyte type. Pertinent dimensions of anodic coatings formed in sulfuric acid, oxalic acid, chromic acid, and phosphoric acid electrolytes are presented, and formulas are given for calculating the cell size and pore volume of these coatings.read more
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Journal ArticleDOI
Enhanced anodization growth of self-organized ZrO2 nanotubes on nanostructured zirconium
Lan Zhang,Jianmin Shao,Yong Han +2 more
TL;DR: In this paper, the effect of substrate microstructure on formation of ZrO2 nanotubes, anodic oxidizations of commercially pure zirconium subjected to surface mechanical attrition treatment (SMATed-Zr), was investigated.
Journal ArticleDOI
Effect of pulse voltage and aluminum purity on the characteristics of anodic aluminum oxide using hybrid pulse anodization at room temperature
TL;DR: In this paper, a hybrid pulse anodization (HPA) method with effective suppression of Joule's heat generation to fabricate AAO at room temperature was proposed and the effects of purity of aluminum foils and pulse voltage on the evolution of pore characteristics have been investigated.
Journal ArticleDOI
Aluminum porous oxide growth—II. On the rate determining step
TL;DR: In this paper, the possibility was analyzed that the electrical breakdown of the barrier layer is the rate determining step during the steady-state growth of the porous oxide on aluminum as part of a discontinuous mechanism suggested in 1983.
Journal ArticleDOI
Fabrication of Porous Membranes for MEMS Packaging by One-Step Anodization in Sulfuric Acid
TL;DR: In this article, a non-lithographic fabrication method that exploits the pore structure of anodic aluminum oxide to fabricate alumina porous membranes for microelectromechanical system (MEMS) packaging is proposed.
Journal ArticleDOI
Anodising and corrosion resistance of AA 7050 friction stir welds
TL;DR: In this article, the influence of friction stir welding on the sulphuric anodising and corrosion of AA7050 was studied in 0.1 M NaCl by the scanning vibrating electrode technique under simultaneous polarization.
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