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       1. What is the principle of color development of anodized and tinned titanium and titanium alloys?

The oxide film formed by anodization of titanium and titanium alloy is colorless and transparent, and the color is developed because the two beams of I1 and I2 interfere with each other, and the thickness of the different oxide films exhibits a specific different color.


 
       2, titanium and titanium alloy anodizing coloring Why some colors will be easy to change color when touched?
The anti-pollution performance of anodized color of titanium and titanium alloy (ie, discoloration after hand touch) is mainly due to the adhesion of grease on the surface of the workpiece after hand touch, and the smaller the color interval, the thickness of the grease layer adhered. The more obvious the change of its color (generally the dark blue, blue, magenta, purple interval is relatively small); at the same time, the higher the roughness of the surface, the thicker the thickness of the adhesive layer, so the coarser the surface, the more obvious the color change.

       3, titanium and titanium alloy anodizing coloring is all the colors on the market can do?
The anodizing coloring of titanium and titanium alloys is the color produced by the interference of light, so it can only produce the color of light interference, such as red and orange.

       4. What is the thickness of the anodized film of titanium and titanium alloy?
Under normal circumstances, an oxide layer is formed on the surface of titanium, which is about 5 nm thick. After anodization, an oxide film with a thickness of about 300 nm can be formed. The higher the voltage, the thicker the color film layer, and the lower the oxidation voltage, the lower the oxidation voltage. The thinner the film.

       5. Does anodizing and tinning of titanium and titanium alloys affect the product size?
The anodizing of titanium and titanium alloy has almost no change in the size of the bright parts. For the sandblasting parts, it is necessary to corrode and remove the elements of the surface blasting, which requires a long time of corrosion. In general, the size of the screw thread is about 0.01mm. It is required that the size requirements of sandblasting parts are high, and it is necessary to reserve the size for the oxidation process of color titanium.

       6. What conditions should be met before the surface state of titanium and titanium alloys are anodized before they are normally anodized?

Titanium and titanium alloys should be oxidized and oxidized to have no scratches, pits, water marks or ultrasonic vibrations during cleaning, vibration marks, oxides on the surface or pores (including oxidized transition layer during rough polishing). , wire cutting surface, welding, original surface of raw materials, etc.)



      

  Vibrating knife                                                                                     Polishing paste

 

       

Polish                                                                                                    Sandblasting

 

      

Rough throwing                                                                                  Sandblasting yin and yang


      

                                                                            Shiny scratches                                                                                                  Wire cutting


      

                                                                               Water stain                                                                        Bright parts ultrasonic cleaning vibrationmarks


       7. What are the effects of various surface states of titanium and titanium alloys on anodizing and coloring?
Titanium and titanium alloys are anodized when there are scratches, pits, water stains or ultrasonic vibrations generated by vibration, oxide scale, surface or pores of oil (including oxidized transition layer, line during rough polishing) Cutting surface, welding, original surface of raw materials, etc.) scratches and pits after scratching and cratering are still visible and cannot be covered; water stains on the surface of the product, if the water stains are slightly corroded, the effect of coloring will not be affected if water If the stain is more severely corroded, the phenomenon of blackening or whitening will not occur when the water stain is removed. If the surface has vibration marks generated by ultrasonic cleaning, the vibration will be whitened after oxidation; if the surface of the product has scale, after severe staining There are mottled colors, especially when the TA3 product is severe, it cannot be colored; if the scale is relatively light, the product will produce a different color in the scale, and the other parts are normal; if there is oil on the surface or the hole, the surface will be stained with oil, if the hole When the oil is oxidized, the oil will emerge from the hole, and it will not be colored properly, and local hair will appear.

       8. What precautions are required for EDS spectrum detection on the surface of titanium and titanium alloy anodized products?
Titanium and titanium alloys are anodized for energy spectrum detection. The oil on the surface of the product must be cleaned and then rinsed with purified water. After wiping and drying, the surface should be free of water stains because the energy spectrum detection is a comparison of surface elements. Precise testing, any substance adhering to the surface of the workpiece may react to the elements detected by the spectrum, which will cause a large error in the detection results.

       9. Does titanium and titanium alloy materials have an effect on the oxidation effect?
Titanium alloy and pure titanium do not affect the oxidation result. Generally, the oxidation of titanium alloy products is relatively easy to achieve, while the products of pure titanium are more difficult to oxidize, and the consistency of the surface of the product is relatively high.

       10. What are the surface conditions required for black and gray anodizing of titanium and titanium alloys?
Titanium and titanium alloy black gray anodized when the product surface is required to have no deep scratches, pits, oil stains or wire cutting marks on the surface, black gray oxidized oxidation voltage is relatively high, the surface reaction is more intense, so some water stains, A slight oily or slightly oxidized scale has little effect on it.

       11. Can titanium and titanium alloy black-gray anodized products be reworked?
Titanium and titanium alloy black-gray anodized products can be reworked, but the oxide film cannot be removed by corrosion and reworked because the black-gray anodized oxidation voltmeter is higher and the reaction is more intense, so the raw materials and outer layers There is a relatively rough transition layer between the oxide films. Once the outer oxide film is removed by etching, a rough transition layer will appear. The roughness of the surface will be much worse than that before oxidation, even if it does not meet the minimum requirements of the implant. The roughness is 0.8 um or less.

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