Metal material having protective coating and method for manufacturing the same
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United States of America Patent
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Sep 12, 2017
Grant Date -
Aug 6, 2015
app pub date -
Feb 4, 2015
filing date -
Feb 5, 2014
priority date (Note) -
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Abstract
A method of manufacturing a metal material is provided. The method includes steps of manufacturing a metal material in which oxygen atoms are dispersed, and forming a protective coating on a surface of the metal material by using an anode oxidation treatment, wherein the oxygen atoms in the metal material are supplied to the surface of the metal material during the anode oxidation treatment, so that the metal material and the protective coating are interface-bonded to each other substantially without pores therebetween or without an interface layer in which pores are formed, thereby improving corrosion resistance, as compared to a protective coating formed on a surface of a metal material in which oxygen atoms are not dispersed.
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