Titanium tube surface alloying can also be called a kind of coating, it is coated with titanium oxide coating on the oxide, compared with strong bonding, wear resistance, corrosion resistance and so on. Compared with titanium palladium alloy, palladium surface content is high, saving precious metal palladium, reducing the cost, but also has excellent performance.
Titanium tube surface aluminizing can reduce the tendency of hydrogen absorption of titanium, 88% of alumina, 4% aluminum fluoride and 8% aluminum powder mixed in the titanium workpiece is the best aluminizing conditions, the temperature of 810 ℃ The The thickness and structure of the aluminized layer depend on the holding time. The use of encapsulated infiltration of aluminum, short-term diffusion can be about 2 mm thick thin coating, good adhesion, does not affect the mechanical properties of the matrix. The coating consists essentially of a titanium oxide phase, forming a barrier that is very effective in preventing hydrogen permeation.
Titanium tube on the palladium, can be heated by different methods can make the layer of palladium plating to the surface layer of titanium tube diffusion, the formation of the surface of the titanium palladium alloy layer, which can improve the corrosion resistance. Heating or laser surface remelting, in principle, are feasible. The use of a laser to irradiate the titanium surface to rapidly melt and coagulate can rapidly melt the palladium film of 150 microns in advance to form a palladium alloy.