Journal ArticleDOI
Structural Features of Oxide Coatings on Aluminum
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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
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Journal ArticleDOI
Anodic oxidation of the AlCu4Mg1 aluminium alloy with dynamic current control
TL;DR: In this article, the effect of dynamic current control on the oxide layer properties is investigated by using a design of experiments (DOE), where the parameter variation includes starting ramps, a step-wise change of the current density in the process and pulse current at electrolyte temperatures of 5°C and 15°C.
Journal ArticleDOI
Fabrication of transmission phase gratings on porous anodic alumina.
TL;DR: The transmission phase grating on anodic alumina membrane (AAM), fabricated by a lithography and chemical etching method, may offer an approach to prepare surface pattern on alumina and could be used in fabricating diffractive optical components such as linear gratings.
Journal ArticleDOI
Relationship between Trace Mn and the Pitting Behavior of Aluminum Foil Used for High Voltage Electrolytic Capacitors
Zuo Hong,Liu Chun-ming +1 more
TL;DR: In this paper, the effect of Mn addition in aluminum anode foils for high voltage electrolytic capacitors on the pitting behavior as well as the properties of the etched foils was studied.
Journal ArticleDOI
Corrosion Behavior of AA2055 Aluminum-Lithium Alloys Anodized in the Presence of Sulfuric Acid Solution
Pedro Oliver Samaniego-Gámez,Facundo Almeraya-Calderón,Erick Maldonado-Bandala,José Cabral-Miramontes,Demetrio Nieves-Mendoza,Javier Olguín-Coca,Luis Daimir López-León,Luis G. Silva Vidaurri,Patricia del Carmen Zambrano-Robledo,Citlalli Gaona-Tiburcio +9 more
TL;DR: In this article, the authors evaluated the corrosion behavior of AA2055 aluminum-lithium alloy anodized in a sulfuric acid bath, varying the current density of 0.19 and 1 A·cm−2 and why the sealing solution was water (H2O) and sodium dichromate (Na2Cr2O7).
Journal ArticleDOI
Formation of complex anodic films on porous alumina matrices
TL;DR: In this paper, the authors investigated the kinetics of growth of complex anodic alumina films by filling porous oxide films (matrices) having deep porosity and calculated the slopes of the kinetic curves during re-anodization by two equations expressing the dependence of these slopes on the ionic current density.
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