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Formation Behavior of Anodic Oxide Films on Al7075 Alloy in Sulfuric Acid Solution
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 Title & Authors
Formation Behavior of Anodic Oxide Films on Al7075 Alloy in Sulfuric Acid Solution
Moon, Sungmo; Yang, Cheolnam; Na, Sangjo;
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 Abstract
The present work is concerned with the formation behavior of anodic oxide films on Al7075 alloy under a galvanostatic condition in 20 vol.% sulfuric acid solution. The formation behaviour of anodic oxide films was studied by the analyses of voltage-time curves and observations of colors, morphologies and thicknesses of anodic films with anodization time. Hardness of the anodic oxide films was also measured with anodization time and at different positions in the anodic films. Six different stages were observed with anodiziation time : barrier layer formation (stage I), pore formation (stage II), growth of porous films (stage III), abnormal rapid oxide growth (stage IV), growth of non-uniform oxide films (stage V) and breakdown of the thick oxide films under high anodic voltages (stage VI). Hardness of the anodic oxide films appeared to decrease with increasing anodization time and with the position towards the outer surface. This work provides useful information about the thickness, uniformity, imperfections and hardness distribution of the anodic oxide films formed on Al7075 alloy in sulfuric acid solution.
 Keywords
Anodic Oxide Film;Al Alloy;Anodization;Hardness;
 Language
Korean
 Cited by
1.
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한국표면공학회지, 2016. vol.49. 1, pp.46-53 crossref(new window)
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Anodic Oxide Films Formed on AZ31 Magnesium Alloy by Plasma Electrolytic Oxidation Method in Electrolytes Containing Various NaF Concentrations,;;

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양극산화 처리된 5083 알루미늄 합금의 해수 내 유속변화에 따른 전기화학적 손상 특성,박일초;김성종;

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Effect of Current Density on Porous Film Formation in Two-Step Anodizing for Al Alloy, Journal of the Korean institute of surface engineering, 2016, 49, 2, 125  crossref(new windwow)
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Anodic Oxide Films Formed on AZ31 Magnesium Alloy by Plasma Electrolytic Oxidation Method in Electrolytes Containing Various NaF Concentrations, Journal of the Korean institute of surface engineering, 2016, 49, 3, 225  crossref(new windwow)
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Effects of Metal Anion Complexes in Electrolyte on the Properties of Anodic Oxide Films on ADC12 Al Alloy, Journal of the Korean institute of surface engineering, 2016, 49, 2, 130  crossref(new windwow)
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