The alloying of the surface of the titanium tube can also be called a coating. Compared with the oxide coating of palladium coated on titanium, it has the advantages of strong bonding, wear resistance and corrosion resistance. Compared with titanium-palladium alloy, the surface content of palladium is high, which saves the precious metal palladium, reduces the cost, and also has excellent performance.
Aluminizing the surface of the Titanium Coil Tube can reduce the tendency of titanium to absorb hydrogen. Mixing 88% alumina, 4% aluminum fluoride and 8% aluminum powder and coating it on the titanium workpiece is the best aluminizing condition. The temperature is 810°C . The thickness and structure of the aluminized layer depend on the holding time. Using the cladding aluminizing method, a thin coating about 2 mm thick can be obtained by short-term diffusion, which has good bonding force and does not affect the mechanical properties of the substrate. The coating consists mainly of a titanium oxide phase, forming a very effective barrier against hydrogen permeation.
After the palladium plating on the Titanium Condenser Tubes, it can be heated by different methods to diffuse the palladium plating layer to the surface area of the titanium tube to form a titanium-palladium alloyed layer on the surface, thereby improving the corrosion resistance. Thermal diffusion or laser surface remelting are possible in principle. Use the laser to irradiate the titanium surface to make it melt and condense rapidly, so that the pre-vacuum-deposited 150-micron palladium film can be rapidly melted to form an effective palladium alloy.
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