Aluminum Alloy Coloring Treatment Process

Abstract

The present disclosure provides a colored anodic aluminum alloy coloring treatment process for achieving the multi-color coloring treatment may be conducted on the surface of an aluminum alloy, and combining pigments and metals by physical coloring and chemical complexation. The process comprises the following steps: carrying out degreasing and decontamination the aluminum alloy, then carrying out alkalization treatment, and neutralizing alkalized substances; chemically polishing the aluminum alloy, neutralizing a chemical polishing compound, and performing anodic oxidation treatment to generate an aluminum oxide dielectric film layer with tiny holes in the surface of the aluminum alloy after anodic oxidation; and printing colorful process patterns on the surface of the aluminum alloy, and conducting air drying treatment and hole sealing treatment on the surface of the aluminum alloy.

What is claimed is: 
     
         1 . The aluminum alloy coloring treatment process is characterized in that it includes the following steps:
 a. Degreasing and decontaminating the surface of aluminum alloy;   b. Alkalizing the surface of aluminum alloy and neutralizing the alkali;   c. Chemically polishing the surface of aluminum alloy and neutralizing the chemical polishing compounds;   d. Anodizing the surface of the aluminum alloy and neutralizing the anodic oxidation chemicals; after anodization, an aluminum oxide dielectric film with tiny holes is formed on the surface of the aluminum alloy;   e. Printing color process patterns on the aluminum alloy surface by a printer using water-based eco-solvent ink, and allowing the color ink to enter the tiny holes;   f. Air-drying the surface of the aluminum alloy that has been printed with color patterns.   
     
     
         2 . The aluminum alloy coloring treatment process according to  claim 1 , characterized in that: after Step d and before Step e, a laser engraving machine is used to pre-process the edge of the pre-printed pattern on the aluminum alloy surface by laser edge sealing. 
     
     
         3 . The aluminum alloy coloring treatment process according to  claim 1 , characterized in that: after Step d and before Step e, a laser engraving machine is used to perform thermal radiation hole expansion treatment on the pre-printed pattern on the surface of the aluminum alloy. 
     
     
         4 . The aluminum alloy coloring treatment process according to  claim 1 , characterized in that: in Step a, a titanium material hanger with good alkali resistance and acid resistance and conductivity is used to place the aluminum alloy workpiece. 
     
     
         5 . The aluminum alloy coloring treatment process according to  claim 1 , characterized in that: in Step a, a 15%-30% nitric acid aqueous solution is used for cleaning, the nitric acid aqueous solution is heated to 60-70° C., and the workpiece is immersed for 3˜5 minutes to remove oil stains and wax stains on the surface of the workpiece. 
     
     
         6 . The aluminum alloy coloring treatment process according to  claim 1 , characterized in that: the tiny holes have a diameter of 0.01-0.03 μm. 
     
     
         7 . The aluminum alloy coloring treatment process according to  claim 1 , characterized in that: the color ink contains dye particles with a diameter of 0.0015-0.003 μm. 
     
     
         8 . The aluminum alloy coloring treatment process according to  claim 1 , characterized in that: in Step d, the surface of the aluminum alloy is anodized for more than 45 minutes. 
     
     
         9 . The aluminum alloy coloring treatment process according to  claim 1 , characterized in that: in Step e, the eco-solvent ink is an aqueous ink.