What do you know about titanium alloys?

Low density and high specific strength. The density of titanium is higher than that of aluminum and lower than that of steel, copper and nickel, but its specific strength is the first among metals. Corrosion resistance, titanium is a very active metal with low equilibrium potential and great tendency of thermodynamic corrosion in medium. But in fact, titanium is very stable in many media, for example, titanium is corrosion-resistant in oxidizing, neutral and weakly reducing media. This is because titanium and oxygen have great affinity. In air or oxygen-containing medium, a dense, adhesive and inert oxide film is formed on the surface of titanium to protect the titanium substrate from corrosion. Even due to mechanical wear, it will heal itself or regenerate quickly. This shows that titanium is a metal with strong passivation tendency. When the medium temperature is lower than 365438 05℃, the titanium oxide film always keeps this characteristic. In order to improve the corrosion resistance of titanium, surface treatment technologies such as oxidation, electroplating, plasma spraying, ion nitriding, ion implantation and laser treatment were developed, which enhanced the protection of titanium oxide film and achieved the expected corrosion resistance. In order to meet the demand for metal materials in the production of sulfuric acid, hydrochloric acid, methylamine solution, high-temperature wet chlorine and high-temperature chloride, a series of corrosion-resistant titanium alloys such as Ti-Mo, Ti-Pd and Ti-Mo-Ni were developed. Ti -32 molybdenum alloy is used for titanium castings, Ti-Mo-Ni alloy is used in the environment where crevice corrosion or pitting corrosion often occurs, or Ti-Pd alloy is used locally in titanium equipment, all of which have achieved good results. The new titanium alloy has good heat resistance and can be used for a long time above 600℃.