Process and prospect of anodic oxidation coloring technology of titanium alloy

Titanium and its alloys have a wide range of applications in the industrial field due to their excellent physical and chemical properties. Among them, anodic oxidation coloring technology, as a method of surface treatment of titanium and its alloys, has attracted much attention because of its simple process, rich color and low cost. The anodic oxidation coloring process of titanium and its alloys and its industrial application prospect will be introduced in detail below.
I. Anodic oxidation coloring process of titanium and its alloys
Degreasing: First of all, it is necessary to use strong alkali degreasing agent to remove the rolling oil residue on the surface of titanium and its alloys. This step is critical, because the oil will affect the effect of the subsequent pickling and anodizing steps, which may lead to uneven coloring.
Initial Pickling: After the degreasing process, an initial pickling is performed. Acid pickling of titanium and its alloys using an aqueous solution of hydrofluoric acid at a concentration of 5% by weight helps to create a distinctive pear skin pattern on its surface.
Secondary Pickling: In order to remove the powdery dirt formed on the surface during the primary pickling process, secondary pickling is required. A mixture of hydrofluoric acid and aqueous hydrogen peroxide is used to clean the surface by forming a stable complex of titanium ions.
Anodic oxidation: Pre-treated titanium and its alloy plates are used as anode and aluminum plates as cathode and placed in 1% weight concentration of phosphoric acid electrolyte for constant voltage treatment. As the voltage rises, the oxide film on the surface of titanium gradually thickens, showing colorful color changes.

Closure: In order to improve the corrosion resistance, pollution resistance and abrasion resistance of the anodic oxide film, closure treatment is required. Commonly used closure methods include hot water closure, steam closure and solution closure containing inorganic salts and organic substances.
Drying: After the sealing treatment is completed, use a clean cotton cloth to wipe off the moisture on the surface of the workpiece and let it dry naturally.
Second, the prospects for industrial applications
The anodic oxidation coloring technology of titanium and its alloys has a wide range of application prospects. First of all, the technology is simple, low cost and suitable for large-scale industrial production. Secondly, the surface color of titanium and its alloys after coloring is rich in color and has good decorative properties, which can meet the requirements of aesthetics in different fields. In addition, the anodic oxidation film has good corrosion resistance, anti-pollution and wear resistance, which can improve the service life and performance stability of titanium and its alloys.
In the industrial field, the anodic oxidation coloring technology of titanium and its alloys can be applied in many fields such as aerospace, medical equipment, building decoration and so on. For example, in the aerospace field, the anodic oxidation coloring technology of titanium and its alloys can be used to manufacture aircraft parts and engine parts, etc.; in the field of medical devices, it can be used to manufacture surgical instruments and implants, etc.; in the field of architectural decoration, it can be used to manufacture doors, windows, curtain walls and other surface treatment of building materials.
In short, the anodic oxidation coloring technology of titanium and its alloys has broad application prospects and huge market potential. With the continuous progress of science and technology and the continuous development of industry, it is believed that this technology will be more widely used and promoted in the future.