Colored shaped aluminum article and method for manufacturing same

Abstract

A shaped aluminum article has an anodized film formed on a surface, where a coloring pigment is filled in fine pores formed on the anodized film, achieving sufficient coloring.

1 . A shaped aluminum article having an anodized film formed on a surface, where a pigment is filled in fine pores formed on the anodized film at a density of 2 mg to 30 mg per 1 square decimeter. 
     
     
         2 . A shaped aluminum article according to  claim 1 , wherein a diameter of an opening of the fine pore is 5 to 300 nm. 
     
     
         3 . A shaped aluminum article according to  claim 1 , wherein a length of the fine pore in a depth direction of the shaped article is 5 to 50 μm. 
     
     
         4 . A shaped aluminum article according to  claim 1 , wherein the fine pores have a portion having an enlarged diameter at a bottom. 
     
     
         5 . An shaped aluminum article according to  claim 1 , wherein the anodized film on the surface of the shaped aluminum article has been formed using a method that includes an anodization treatment stage implemented under a condition of constant current, and a subsequent anodization treatment implemented in a phosphoric acid solution. 
     
     
         6 . A method of coloring a surface of a shaped aluminum article, comprising:
 giving to a shaped aluminum article an anodization treatment that includes an anodization treatment implemented under a condition of constant current, and a subsequent anodization treatment implemented at a constant voltage, to form an anodized film having fine pores on a surface of the shaped aluminum article; and   soaking the obtained shaped aluminum article in an aqueous solution of metallic salts and then applying alternating current thereto in the aqueous solution to cause a pigment to deposit in, and fill, the fine pores formed.   
     
     
         7 . A shaped aluminum article according to  claim 2 , wherein a length of the fine pore in a depth direction of the shaped article is 5 to 50 μm. 
     
     
         8 . A shaped aluminum article according to  claim 2 , wherein the fine pores have a portion having an enlarged diameter at a bottom. 
     
     
         9 . An shaped aluminum article according to  claim 2 , wherein the anodized film on the surface of the shaped aluminum article has been formed using a method that includes an anodization treatment stage implemented under a condition of constant current, and a subsequent anodization treatment implemented in a phosphoric acid solution. 
     
     
         10 . A shaped aluminum article according to  claim 3 , wherein the fine pores have a portion having an enlarged diameter at a bottom. 
     
     
         11 . A shaped aluminum article according to  claim 7 , wherein the fine pores have a portion having an enlarged diameter at a bottom. 
     
     
         12 . An shaped aluminum article according to  claim 3 , wherein the anodized film on the surface of the shaped aluminum article has been formed using a method that includes an anodization treatment stage implemented under a condition of constant current, and a subsequent anodization treatment implemented in a phosphoric acid solution. 
     
     
         13 . An shaped aluminum article according to  claim 4 , wherein the anodized film on the surface of the shaped aluminum article has been formed using a method that includes an anodization treatment stage implemented under a condition of constant current, and a subsequent anodization treatment implemented in a phosphoric acid solution. 
     
     
         14 . An shaped aluminum article according to  claim 7 , wherein the anodized film on the surface of the shaped aluminum article has been formed using a method that includes an anodization treatment stage implemented under a condition of constant current, and a subsequent anodization treatment implemented in a phosphoric acid solution. 
     
     
         15 . An shaped aluminum article according to  claim 8 , wherein the anodized film on the surface of the shaped aluminum article has been formed using a method that includes an anodization treatment stage implemented under a condition of constant current, and a subsequent anodization treatment implemented in a phosphoric acid solution. 
     
     
         16 . An shaped aluminum article according to  claim 10 , wherein the anodized film on the surface of the shaped aluminum article has been formed using a method that includes an anodization treatment stage implemented under a condition of constant current, and a subsequent anodization treatment implemented in a phosphoric acid solution. 
     
     
         17 . An shaped aluminum article according to  claim 11 , wherein the anodized film on the surface of the shaped aluminum article has been formed using a method that includes an anodization treatment stage implemented under a condition of constant current, and a subsequent anodization treatment implemented in a phosphoric acid solution.