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
Electrochemical etching of patterned Al (1 0 0) foils in HCl
TL;DR: In this paper, the FIB-SEM indicates that the interface between the masked and unmasked regions is vertical and that the masking is confined to the top Al surface and is etched under the mask if the etching time exceeds a threshold.
Journal ArticleDOI
The effect of propylene glycol on the optical properties of iridescent porous anodic alumina films
TL;DR: In this article, the pore growth rate of the films during anodization can be greatly decreased by adding propylene glycol, and the reasons would be given in this paper.
Journal ArticleDOI
A novel theory interpreting the extremes of current during potentiostatic anodising of Al and the mechanisms of normal and abnormal growth of porous anodic alumina films
G. Patermarakis,J. Plytas +1 more
TL;DR: In this article, the kinetics and mechanism of growth of porous anodic alumina films were studied during potentiostatic Al anodising at suitable ranges of H2SO4 concentrations, temperatures, anodic potentials, stirring rates, distances of Al from stirrer and times.
Journal ArticleDOI
A large electrochemical setup for the anodization of aluminum towards highly ordered arrays of cylindrical nanopores.
TL;DR: A new electrochemical setup and the associated procedures for growing ordered anodic aluminum oxide pore arrays on large surfaces are presented, facilitating the availability of porous anodic alumina as a template system for a number of applications.
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