Aluminum alloy having excellent anodic oxidation treatability, and anodic-oxidation-treated aluminum alloy member
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United States of America Patent
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Feb 13, 2018
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app pub date -
Jul 10, 2013
filing date -
Jul 26, 2012
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Abstract
An aluminum alloy comprising more than 3.5% and up to 6.0% of Mg, 0.02 to 1.0% inclusive of Cu, 0.02 to 0.1% inclusive of Cr, and a remainder made up by Al and unavoidable impurities, wherein the contents of Si and Fe in the unavoidable impurities are limited to 0.05% or less and 0.05% or less, respectively, and wherein the number of intermetallic compound particles contained in the aluminum alloy and having a maximum length of 4 μm or more is 50 particles or less per 1 mm2 of an arbitrary cross-sectional area of the aluminum alloy. An aluminum alloy is provided, which has excellent anodic-oxidation-treatability and can be used for providing an anodic-oxidation-treated aluminum alloy member having high withstand voltage properties and such excellent heat resistance that the occurrence of cracking under high temperatures conditions can be prevented.
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