Method of manufacturing an interference coating

Abstract

A method of manufacturing an interference coating on the surface of an aluminum alloy or aluminum alloys product comprising anodizing and electrochemical dyeing with use of alternating current consisting in that, the electrolyte used during electrochemical dyeing comprises copper (II) sulfate (IV) in an amount from 1 to 100 g/L, boric acid in the amount of 1 to 40 g/L and tartaric acid in the amount of 0.1 to 20 g/L.

1 . A method of manufacturing an interference coating on the surface of an aluminum alloy or aluminum alloys product comprising anodizing and electrochemical dyeing with use of alternating current, characterized in that, the electrolyte used during electrochemical dyeing comprises copper (II) sulfate (VI) in an amount from 1 to 100 g/L, boric acid in the amount of 1 to 40 g/L and tartaric acid in the amount of 0.1 to 20 g/L. 
     
     
         2 . The method according to  claim 1 , characterized in that, dyeing is conducted under continuous stirring of electrolyte. 
     
     
         3 . The method according to  claim 1 , characterized in that, the time of dyeing is longer than 10 seconds. 
     
     
         4 . The method according to  claim 1 , characterized in that, dyeing is conducted at a temperature 5-40° C. 
     
     
         5 . The method according to  claim 1 , characterized in that, dyeing is conducted with use of alternating current having voltage in range 0.5-50 V. 
     
     
         6 . The method according to  claim 1 , characterized in that, anodizing is conducted in the solution of sulfuric acid (VI) having concentration of 50-500 g/L with the addition of aluminum ions in the amount of 0-100 g/L. 
     
     
         7 . The method according to  claim 1 , characterized in that, anodizing is conducted at a current density of 0.1-5 A/dm 2 . 
     
     
         8 . The method according to  claim 1 , characterized in that, anodizing is conducted for 10-3600 seconds. 
     
     
         9 . The method according to  claim 1 , characterized in that, the product is sealed after dyeing. 
     
     
         10 . The method according to  claim 9 , characterized in that, sealing is conducted by hot or cold hydrothermal or vapor deposition methods. 
     
     
         11 . The method according to  claim 10 , characterized in that, sealing is conducted by vapor deposition method using atomic layer deposition.