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Electronic processes in anodic A1₂O₃ Cochran , John Francis

Abstract

Some of the properties of the luminescence which accompanies the oxidation of aluminum in weak acids, such as boric acid, have been investigated. An apparatus to measure electronic current directly has been built and used to corroborate Dekker and Urquhart's theory of electronic conduction through anodic oxide layers. Anderson's theory of oxide growth has been substantiated by oxidizing plates in an Oxalic acid solution and comparing the thicknesses of the oxide layers with their calculated thicknesses. The porosity of layers formed in Oxalic acid has been obtained as a function of current density. A modification of Anderson's theory of the growth of porous layers has been advanced.

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