Anodizable aluminum alloy plate and method of manufacturing the same

Abstract

An anodizable aluminum plate and a method of manufacturing the anodizable aluminum plate are provided. An aluminum alloy material is provided, and the aluminum alloy material is anodized at a temperature at a voltage in a range of 4 volts (V) to 14 V.

What is claimed is: 
     
         1 . A method of manufacturing an anodizable aluminum plate, the method comprising:
 providing an aluminum alloy material; and   anodizing the aluminum alloy material at a voltage in a range of 4 volts (V) to 14 V.   
     
     
         2 . The method of  claim 1 , wherein anodizing the aluminum alloy material comprises anodizing the alloy material at a temperature in a range of 5° C. to 30° C. and at voltage in a range of 4 V to 10 V for 5 to 180 minutes. 
     
     
         3 . The method of  claim 2 , wherein anodizing the aluminum alloy material comprises a pretreatment process, an anodizing process, a sealing process, and an elution process. 
     
     
         4 . The method of  claim 3 , wherein anodizing the aluminum alloy material further comprises a coloring process. 
     
     
         5 . The method of  claim 3 , further comprising:
 polishing the aluminum alloy material or forming surface unevenness after providing the aluminum alloy material.   
     
     
         6 . The method of  claim 5 , wherein polishing the aluminum alloy material comprises a physical polishing process of wet or dry polishing of a surface of the aluminum alloy material, and wherein a 60-degree gloss meter value of the anodizable aluminum plate on which the physical polishing process has been performed is 100 to 800 GU. 
     
     
         7 . The method of  claim 5 , wherein polishing the aluminum alloy material comprises an electrolytic polishing process in which the aluminum alloy material is polished at a temperature ranging from a room temperature to 90° C. and a voltage in a range of 10 V to 50 V. 
     
     
         8 . The method of  claim 7 , wherein the 60-degree gloss meter value of the anodizable aluminum plate on which the electrolytic polishing process has been performed is 200 to 500 gloss units (GU). 
     
     
         9 . The method of  claim 2 , wherein:
 the anodized aluminum plate includes a plurality of pores, and a length of a cross-section of a structure including at least one pore and walls surrounding the pore is in a range of 0.30 micrometers (μm) to 0.55 μm, and   the 60-degree gloss meter value of the anodized aluminum plate is 200 GU or more.   
     
     
         10 . The method of  claim 2 , wherein the anodized aluminum plate has a color difference meter value of brightness (L) of 85.00 or more. 
     
     
         11 . The method of  claim 10 , wherein the anodized aluminum plate has the color difference meter value of hue (a) of −0.40 or more and the color difference meter value of saturation (b) of 3.00 or less. 
     
     
         12 . The method of  claim 2 , further comprising:
 protecting an anodized surface by performing coating on a surface of the anodized aluminum plate after the anodizing of the aluminum alloy material.   
     
     
         13 . The method of  claim 12 , wherein protecting the anodized surface comprises at least one of electrophoretic coating, a process of coating a high-hardness thin film including an organic and/or inorganic hybrid resin, and a deposition process using a metal and an inert gas. 
     
     
         14 . An anodizable aluminum plate, wherein the anodizable aluminum plate has a 60-degree gloss meter value of at least 120 gloss units (GU) through an anodizing treatment using a voltage in a range of 4 volts (V) to 10 V. 
     
     
         15 . The anodizable aluminum plate of  claim 14 , wherein the anodized aluminum plate includes a plurality of pores, and
 a length of a cross section of a structure including at least one pore and a wall surrounding the pore is in a range of 0.30 micrometers (μm) to 0.55 μm.   
     
     
         16 . The anodizable aluminum plate of  claim 14 , wherein the anodizable aluminum plate includes a white color, which has a color difference meter value of brightness (L) of 85.00 or more. 
     
     
         17 . The anodizable aluminum plate of  claim 16 , wherein the anodizable aluminum plate includes the white color which has a numerical color difference meter value of hue (a) of −0.40 or more and a color difference meter value of saturation (b) of 3.00 or less. 
     
     
         18 . The anodizable aluminum plate of  claim 14 , wherein the anodizable aluminum plate comprises an aluminum 6xxx series alloy, which contains 0.2-1.0 wt % of silicon (Si), 0.4-1.2 wt % of magnesium (Mg), and a remainder includes aluminum (Al) and at least one impurity. 
     
     
         19 . The anodizable aluminum plate of  claim 18 , wherein the at least one impurity of the aluminum 6xxx series alloy is at least one of iron (Fe), copper (Cu), manganese (Mn), chromium (Cr), zinc (Zn), and titanium (Ti). 
     
     
         20 . An electronic device including an exterior material made of an aluminum alloy, the electronic device comprising:
 a housing comprising a front cover facing a first direction and a rear cover facing a second direction opposite the first direction, and including a transparent region, which forms at least a portion of the front cover; and   a display device disposed in the housing and having a screen region exposed through the front cover,   wherein the housing includes an aluminum 6xxx series alloy, and has a 60-degree gloss meter value of at least 120 gloss units (GU) through an anodizing treatment using a voltage in a range of 4 volts (V) to 10 V.