Application status of titanium and titanium alloys
Titanium material is widely used in following fileds
1. The application of titanium in the chemical industry and other sectors
Another notable feature of titanium is its strong corrosion resistance. This is because it has a particularly strong affinity for oxygen and can form a dense oxide film on its surface, which can protect titanium from medium corrosion. Titanium metal can form a passive oxide film on the surface in most aqueous solutions. Therefore, titanium has good stability in acidic, alkaline, neutral salt solutions and oxidizing media. It has better corrosion resistance than existing stainless steel and other non-ferrous metals, and is even comparable to platinum. However, if the oxide film on the titanium surface can be continuously dissolved in a certain medium, the titanium will be corroded in this medium. For example, titanium is corroded in hydrofluoric acid, concentrated or hot hydrochloric acid, sulfuric acid, and phosphoric acid because these solutions dissolve the oxide film on the titanium surface. If oxidants or certain metal ions are added to these solutions, the oxide film on the titanium surface will be protected, and the stability of titanium will increase at this time.
2.Fertilizer Industry
Urea is an important fertilizer. In the production process, urea, ammonia, ammonium carbamate and their mixtures are very corrosive under high temperature and high pressure conditions. After using titanium to replace stainless steel, the life of the equipment is greatly increased, and the maintenance time is greatly reduced. Therefore, the main equipment in urea production currently uses titanium.
3.Desalination and shipbuilding industry
The ability of titanium to resist seawater corrosion is better than that of all other metals. Titanium has special stability in static or high-speed flowing seawater. Therefore, titanium is an ideal material for seawater desalination equipment. The number of applications of titanium in this field will increase. Titanium has strong resistance to sea water and ocean air corrosion, and is strong and light. It is an ideal structural material for the shipbuilding industry. It has been widely used in many parts of various ships and deep-water submarines.
4.Power Industry
Titanium has good stability in many corrosive hot water containing chlorides, sulfides, etc. Therefore, titanium has been used in large quantities as cooling tubes of heat exchangers in thermal power plants. After replacing the copper-nickel alloy tube with a thin-walled titanium tube, not only the service life is greatly increased, but also the maintenance time is greatly reduced, and the economic effect is very significant.
5.Paper and textile industry
Titanium has special corrosion resistance to chlorine dioxide, chlorite, chlorite and other bleaching agents. Therefore, titanium has important applications in bleaching equipment in textile printing and dyeing industry and papermaking industry. For example, the sub-bleaching machine made of titanium has a good effect. At the same time, it is also used as a spinneret in industries such as synthetic fibers.
6.Application of titanium in petroleum, chemical and other sectors
6.1.Petrochemical applications: reactors, pressure vessels, heat exchangers, separator piping, distillation tower top condenser lining, etc.
6.2. Chemical industry uses: distillation towers, reactors, pressure vessels, heat exchangers, filters, measuring instruments, steam turbine blades, pumps, valves, pipes, chlor-alkali production electrodes, synthetic tower linings, and other acid-resistant equipment linings.
6.3. Paper industry: agitator, bleaching tower, heating pot, reaction tower piping.
6.4. Textile industry: continuous bleaching machine, distillation tower, reaction tank, condenser, heat exchange tube, centrifugal separator, spinneret, valve, pump.
6.5. Metallurgical industry: steel-making getter, alloy additives, superconducting alloy materials, cathode plates for electrolysis of high-purity metals (such as sodium, nickel, cobalt) and electroplating tanks, etc.
6.6. Seawater desalination and power plant heat exchangers, condensers, water supply heaters, pipes, and other equipment that contacts seawater.
6.7. Naval ship industry: ship hulls, decks, valves, wings, speedboat propellers, drive shafts, steam engines, deep submarine pressure chambers, development of marine equipment.
6.8. Medical field: ultra-high vacuum titanium pump, medical and orthopedic equipment, artificial joints, pharmaceutical and food industry equipment.
7.Application of titanium in aviation industry and other sectors
Uses: aircraft fuselage and skins, engines, tail cones, nozzles, ejection compartments, fire walls, sandwich structure fuselage frames, connectors and other parts.
The liquid fuel tank, high-pressure container, cabin, skin, structural skeleton, main landing gear of brake rocket, rocket, missile high-pressure container, liquid fuel tank, shell, nozzle, rocket engine of the aerospace industrial spacecraft.
Others: structural materials for nuclear reactors, tank skylights, barrels and light conventional weapons, etc.
