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      Surface treatment methods for titanium and titanium alloys

      Date:2024-03-04 17:15:16       Number of views:

      Surface treatment methods for titanium and titanium alloys


      [Method 1]


      Common solvents for degreasing: trichloroethylene, acetone, butanone, benzene, ethyl acetate, gasoline, anhydrous ethanol.


      [Method 2]


      After degreasing, immerse in the following solution at 20 ° C for 5-10 minutes:


      Sodium fluoride, 2 chromium oxide, 1 sulfuric acid (d=1.84), 10 water, 50


      Rinse with water, wash with distilled water, and dry at 93 ° C.


      [Method 3]


      Treat at 20 ° C for 2 minutes in the following solution:


      Hydrofluoric acid (concentrated) 84 hydrochloric acid (37%) 8.9 phosphoric acid (85%) 4.3


      Rinse with water, rinse with distilled water, and dry at 93 ° C.


      [Method 4]


      After degreasing, wash with alkaline aqueous solution, and then treat at room temperature for 4-6 minutes in the following solution:


      Nitric acid (70%) 5 ammonium fluoride 3 water 92


      After washing with water, treat at room temperature for 2 minutes in the following solution:


      Trisodium phosphate 5 sodium fluoride 1 hydrofluoric acid 1.5 water 92.5


      Dry after washing with water.


      [Method 5]


      After degreasing, scrub with the following solution for 2-3 minutes:


      Trisodium phosphate 5 sodium fluoride 1.3 hydrofluoric acid 2.9 water 90.8


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