Journal ArticleDOI
Structural Features of Oxide Coatings on Aluminum
TLDR
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
Citations
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Journal ArticleDOI
Investigation of intrinsic mechanisms of aluminium anodization processes by analyzing the current density
TL;DR: In this article, the intrinsic mechanisms of aluminium anodization processes have been investigated in detail by analyzing the anodic aluminum oxides (AAO) current density, and it is found that the electrolyte dissociation constant can have a direct impact on the avalanche electronic current density and Umax.
Journal ArticleDOI
The dissolution of porous oxide films on aluminium
TL;DR: In this article, a study of capacitance measurements of porous alumina films in acidic chloride and sulphate solution has shown that the dissolution mechanism can be described using zero-order kinetics.
Journal ArticleDOI
In situ determination of the pore opening point during wet-chemical etching of the barrier layer of porous anodic aluminum oxide: nonuniform impurity distribution in anodic oxide.
TL;DR: It is found that opening of the barrier oxide layer by wet-chemical etching can be significantly influenced by anodization time (tanodi), and a concentration gradient of anionic impurity in the outer pore wall oxide may be established along both the vertical and radial directions of cylindrical pores.
Journal ArticleDOI
Self-Ordered Titanium Dioxide Nanotube Arrays: Anodic Synthesis and Their Photo/Electro-Catalytic Applications.
TL;DR: The scope of this review summarizes some of the recent advances made using metal oxide nanotube arrays formed via anodization in solar-based applications.
Journal ArticleDOI
Tubular membrane-like catalyst for reactor with dielectric-barrier-discharge plasma and its performance in ammonia synthesis
TL;DR: In this article, a membrane-like alumina tube was designed as a new type of catalyst for a reactor with plasma produced by dielectric-barrier discharge, and the results clearly indicate a synergistic effect of plasma and catalysis of the alumina and ruthenium on the ammonia synthesis.
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