Treatment method of titanium tube surface

The alloying of the surface of the titanium alloy tube can also be called a kind of coating. Compared with the oxide coating of palladium-coated on titanium, it has the advantages of strong bonding force, wear resistance and corrosion resistance. Compared with titanium-palladium alloy, palladium has high surface content, which saves precious metal palladium, reduces cost, and also has excellent performance.

Aluminizing the surface of the titanium tube can reduce the hydrogen absorption tendency of titanium. It is a good aluminizing condition to mix 88% alumina, 4% aluminum fluoride and 8% aluminum powder and coat it on the titanium workpiece. The temperature is 810 °C . The thickness and structure of the aluminized layer depend on the holding time. Using the infiltration method to aluminize, a thin coating with a thickness of about 2 mm can be obtained by diffusion in a short time, and the bonding force is good and does not affect the mechanical properties of the substrate. The coating consists mainly of the titanium oxide phase, forming a very effective barrier against hydrogen permeation.

After the palladium is plated on the Grade 9 Ti3Al2.5V Titanium Pipe, the palladium-plated layer can be diffused to the surface area of ​​the titanium tube by heating in different ways to form a titanium-palladium alloyed layer on the surface layer, thereby improving the corrosion resistance. Heating diffusion or laser surface remelting are in principle feasible. Using a laser to irradiate the titanium surface to make it melt and condense rapidly, the pre-vacuum-deposited 150-micron palladium-plated film can be rapidly melted to form an effective palladium alloy.

Surface treatment of titanium tubes has many advantages, which can not only increase the oxidation resistance of titanium tubes, but also enhance the gloss of the surface of titanium tubes. Different titanium tube surface treatment methods will meet different performance requirements for titanium tubes, which is an important manifestation of the production and manufacturing capabilities of titanium tube manufacturers at this stage.