Anodizing method of aluminum and aluminum product

Abstract

According to an aspect of the present invention, there is provided an aluminum product. The Aluminum product may comprise an aluminum substrate configured to include a pattern and a white aluminum fluoride (AlF 3 ) film on a surface thereof; and an anodized film configured to be disposed adjacent to the white aluminum fluoride (AlF3) film and include a plurality of pores.

What is claimed is: 
     
         1 . An aluminum product, comprising:
 an aluminum substrate configured to include a pattern and a white aluminum fluoride (AlF 3 ) film on a surface thereof; and   an anodized film configured to be disposed adjacent to the white aluminum fluoride (AlF 3 ) film and include a plurality of pores.   
     
     
         2 . The aluminum product according to  claim 1 , wherein the pattern is configured to have a roughness in a range of 5 to 100 nm. 
     
     
         3 . The aluminum product according to  claim 1 , wherein the pattern and the white aluminum fluoride (AlF 3 ) film are configured to be formed by exposing the aluminum substrate to a solution containing at least one selected from the group consisting of fluorine ions, ammonium hydrogen fluoride, potassium hydrogen fluoride, sodium hydrogen fluoride, ammonium fluoride, potassium fluoride, sodium fluoride, hydrofluoric acid, sodium borofluoride, potassium borofluoride, ammonium borofluoride, titanium potassium fluoride, titanium sodium fluoride, and titanium ammonium fluoride. 
     
     
         4 . The aluminum product according to  claim 1 , wherein the anodized film is configured to be formed through an anodizing process by exposing the aluminum substrate to an anodizing liquid. 
     
     
         5 . The aluminum product according to  claim 4 , wherein the anodizing liquid is configured to include at least one of an acid solution and a mixture of the acid solution and an acrylic resin added to the acid solution. 
     
     
         6 . The aluminum product according to  claim 5 , wherein the acrylic resin is at least one selected from the group consisting of hydroxypropyl methacrylate, neopentanediol dimethacrylate, and polypropylene glycol methacrylate. 
     
     
         7 . The aluminum product according to  claim 1 , wherein the anodized film is configured to include the plurality of pores colored with a dye on an inside thereof. 
     
     
         8 . The aluminum product according to  claim 7 , wherein the dye is configured to be used for coloring in a form of a dispersion in an acrylic resin contained in an inside of the plurality of pores. 
     
     
         9 . A method of anodizing aluminum, comprising:
 modifying a surface of an aluminum substrate;   whitening the aluminum substrate by exposing the aluminum substrate to a solution containing fluorine ions to form a pattern on a surface of the aluminum substrate and forming a white AlF 3  film; and   forming an anodized film including a plurality of pores by anodizing the aluminum substrate in an anodizing liquid containing an acid solution.   
     
     
         10 . The method according to  claim 9 , wherein the formation of a pattern on a surface of the aluminum substrate includes forming a pattern having a roughness in a range of 5 to 100 nm. 
     
     
         11 . The method according to  claim 9 , wherein the formation of a pattern on a surface of the aluminum substrate includes forming a pattern by etching the aluminum substrate with the solution containing fluorine ions. 
     
     
         12 . The method according to  claim 9 , wherein the formation of a pattern on a surface of the aluminum substrate includes forming a pattern on the surface of the aluminum substrate by exposing the aluminum substrate to a solution containing at least one selected from the group consisting of ammonium hydrogen fluoride, potassium hydrogen fluoride, sodium hydrogen fluoride, ammonium fluoride, potassium fluoride, sodium fluoride, hydrofluoric acid, sodium borofluoride, potassium borofluoride, ammonium borofluoride, titanium potassium fluoride, titanium sodium fluoride, and titanium ammonium fluoride. 
     
     
         13 . The method according to  claim 9 , wherein the anodizing liquid is configured to further include an acrylic resin in addition to the acid solution. 
     
     
         14 . The method according to  claim 13 , wherein the acrylic resin is at least one selected from the group consisting of hydroxypropyl methacrylate, neopentanediol dimethacrylate, and polypropylene glycol methacrylate. 
     
     
         15 . The method according to  claim 9 , further comprising providing a dye to the plurality of pores. 
     
     
         16 . The method according to  15 , further comprising providing a mixture of an acrylic resin and a dye to the plurality of pores. 
     
     
         17 . The method according to  claim 15 , further comprising heat-treating the surface of the aluminum substrate. 
     
     
         18 . The method according to  claim 15 , further comprising ultraviolet curing the surface of the aluminum substrate.