Do those industries all require non-ferrous metal equipment such as titanium, tantalum, zirconium, and nickel?

Titanium and titanium alloys possess many advantages such as light weight, high strength, and corrosion resistance. Not only are they widely used in the aviation and aerospace industries, but they are also beginning to be applied extensively in various civilian industrial sectors including chemicals, petroleum, light industry, power generation, and metallurgy. Another notable feature of titanium is its strong corrosion resistance, which stems from its high affinity for oxygen; this allows a dense oxide layer to form on its surface, protecting the titanium from corrosion by various substances. Metal titanium can form a passivating oxide film on its surface in most aqueous solutions. Therefore, titanium exhibits good stability in acidic, alkaline, neutral saline solutions, as well as in oxidizing media; however, it will be corroded in certain media that can continuously dissolve the oxide film on its surface. For example, in hydrofluoric acid, concentrated hot hydrochloric acid, molten acid, and phosphoric acid, titanium is corroded because the solution dissolves the oxide film on the titanium surface. If an oxidizing agent or certain metal ions are added to these solutions, the oxide film on the titanium surface is protected. 1. Chlor-alkali industry: Titanium is used in the chlor-alkali industry in the form of ruthenium-titanium anodes and titanium-based wet chlorine coolers, achieving excellent economic results; this has been regarded as a major revolution in the chlor-alkali industry. 2. Metallurgical industry: Titanium exhibits excellent stability in acidic solutions containing metal ions; therefore, it is widely used in hydrometallurgical processes, such as the electrolytic production of non-ferrous metals like copper, nickel, cobalt, and manganese. 3. Chemical industry: Titanium exhibits excellent stability in various acid, base, and salt media, with the exception of the four aforementioned inorganic acids and highly corrosive aluminum chloride. Therefore, titanium is an excellent corrosion-resistant material in the chemical industry. 4. Fertilizer industry: Urea is an important fertilizer. During its production, urea, amines, amino acid amines, and their mixtures are highly corrosive under high temperature and pressure conditions. By using titanium instead of stainless steel, the lifespan of equipment is **increased** and maintenance time is **reduced**. Therefore, titanium is currently used in the main equipment for urea production. 5. Power industry: Titanium exhibits excellent stability in hot water containing corrosive substances such as chlorides and slurries; therefore, it is widely used in thermal power generation as cooling tubes for heat exchangers. 6. Desalination: Titanium has a better resistance to seawater corrosion than any other metal, and it maintains its stability both in still seawater and in seawater with high flow rates. Therefore, titanium is an ideal material for seawater desalination devices. Titanium is highly resistant to corrosion by seawater and marine air, and it possesses high strength and low weight, making it an ideal material for the shipbuilding industry. 7. Paper and textile industries: Titanium exhibits special corrosion resistance against bleaching agents such as chlorine dioxide, chlorous acid, and chlorites. Therefore, titanium plays an important role in the textile dyeing industry and in the bleaching equipment of the paper industry. 8. Other aspects: Titanium can resist corrosion by human body tissue fluids and is harmless to humans. Therefore, it is widely used in the medical and pharmaceutical industries. It is also widely used in electronic vacuum technology and high-vacuum technology. Titanium is used in industries such as petroleum and chemicals. This post was last edited by lely325 on 2008-3-8 09:23.]

The acetic acid reactor, conversion reactor, as well as the connected pipelines, auxiliary equipment, and pumps must be made of zirconium material. Of course, devices made of pure silver can also be used; however, their cost is higher than that of zirconium-based materials, and they are also prone to being lost: lol. As for nickel, it seems that almost all stainless steels contain nickel; I’m not sure what the original poster meant:P

Metallic tantalum and its uses: Tantalum, with the chemical symbol Ta, is named after Tantalus, the king of wealth in Greek mythology; it was discovered in 1802. Tantalum is almost completely resistant to erosion, and it makes a significant contribution to the repair of the human body in surgical procedures: it can replace bones (such as the skull) ； When made into foil or filaments, it can connect severed nerves ； Woven mesh can be used to wrap the muscles of the abdomen. Tantalum is a light gray metal with a slight blue tint; due to its many unusual properties, it has a wide range of applications, which is why it is regarded as a versatile element in the \"kingdom of metals\". Tantalum is extremely hard, with a hardness of 6–6.5. Its melting point is as high as 2996°C, ranking third only to tungsten and rhenium. Density 16.6. Tantalum is malleable and can be drawn into thin wires or made into thin foils. Its coefficient of thermal expansion is very low; it expands by only 0.0066 percent for every increase of one degree Celsius. In addition, it has great toughness, even better than that of copper. Tantalum also possesses excellent chemical properties, with very high corrosion resistance. It shows no reaction to hydrochloric acid, concentrated nitric acid, and aqua regia, whether under cold or hot conditions. When tantalum is immersed in sulfuric acid at 200°C for a year, the surface layer suffers only an erosion of 0.006 millimeters. Experiments have shown that at room temperature, tantalum is unaffected by alkaline solutions, chlorine gas, bromine water, dilute sulfuric acid, and many other chemicals; it only reacts in the presence of hydrofluoric acid and hot concentrated sulfuric acid. Such a situation is relatively rare in metals. The properties of tantalum enable it to be used in a wide range of applications. In equipment for producing various inorganic acids, tantalum can be used as a substitute for stainless steel, offering a service life that is dozens of times longer than that of stainless steel. Furthermore, in industries such as chemicals, electronics, and electrical engineering, tantalum can replace the role previously played by the precious metal platinum, thereby **reducing** costs. Furthermore, tantalum is also an important element in the production of super-strong steels, corrosion-resistant steels, and heat-resistant steel alloys, enabling the development of special materials necessary for space technologies such as rockets, spacecraft, and jet planes. Non-magnetic alloys made of tantalum and tungsten are widely used in the electrical industry; in particular, tantalum carbide, which consists of tantalum and carbon, possesses extremely high hardness, rivaling that of diamond even at high temperatures. The cutting tool made from it can cut many hard alloys at high speeds ； The various drills made from it can replace the hardest alloys or diamonds. Therefore, tantalum is also considered a “vitamin” in smelting. In modern medicine, tantalum can also play an important role. Studies have shown that tantalum not only causes no harm to the human body, but muscles in the body can also grow on it; this is medically referred to as \"biocompatibility\". Doctors take advantage of this property of tantalum to repair and seal fractured skulls in the human body, as well as cracks and defects in broken limbs. At the same time, tantalum can also be made into filaments that are one-tenth as thin as a human hair, to be used as sutures in internal surgeries or embedded in artificial eyeballs. Such tantalum wires can even replace tendons and nerve fibers. Medical experts created artificial ears using tantalum plates, which were placed on the head; skin was then transplanted from the legs. After some time, the newly transplanted skin grew well, making it almost impossible to tell that it was an artificial tantalum ear. Tantalum can be used to make solid electrolytic capacitors with large capacity, small size, and stable performance, which are employed in radars, missiles, supersonic aircraft, and computers. But it can also manufacture petrochemical heat exchangers, heaters, concentrators, as well as tanks, towers, pipes, and valves for reactors. It is also used as a material for electronic emission tubes and high-power electron tube components. Tantalum alloys can be used as materials for supersonic aircraft combustion chambers and for withstanding high temperatures. Missile nozzles made of tantalum-tungsten alloy maintain a strength of 8 kg/mm2 at 1650°C. Tantalum carbide can be used alone or together with other carbides as coatings for forging dies, cutting tools, jet engine turbine blades, valves, and rocket nozzles. Tantalum carbide has a hardness similar to that of diamond, and it is widely used in the manufacture of cemented carbides. Tantalum can also be used as surgical graft material and artificial bone, as well as for plates, screws, rods, and sutures. This post was last edited by qianlima_wangyr on 2008-3-8 09:28]

Serial numbers of the main uses of tantalum and niobium: Purpose, examples, and explanations. 1. Tantalum is used in the manufacture of tantalum capacitors. Tantalum powder and tantalum wire are key materials for producing tantalum capacitors, which are among the best types of capacitors. Niobium can also be used to manufacture capacitors. Tantalum is employed in the production of high-temperature resistant tantalum products; due to its ability to withstand high temperatures along with its good strength and stiffness, it is an excellent material for manufacturing heating elements, insulation components, and containers for use in vacuum high-temperature furnaces. Tantalum and niobium are used to create corrosion-resistant tantalum-niobium products; these materials are highly resistant to acids, alkalis, and liquid metals, and can be utilized in the chemical industry to make boilers, heaters, coolers, and various other devices. Tantalum and niobium find application in the aerospace industry as well, where they are used to manufacture engine components for aircraft, rockets, submarines, etc., such as combustion chambers, combustion ducts, and turbine pumps. High-temperature Nb-based alloys such as WC-103 Nb-Hf-Ti are high-quality materials for aerospace applications, used in rocket accelerator nozzles, spacecraft propulsion boosters, and nozzle valves. 5. Titanium is used to manufacture liners for armor-piercing projectiles. This application is currently mainly found in the United States, and it relates to missiles such as the TOW2B missile. 6. Tantalum carbide is used as an additive in cemented carbides. Cemented carbides are primarily used in cutting tools, instruments, molds, and structural components that require wear and corrosion resistance; the addition of TaC improves their hardness, strength, melting point, and other properties. NbC can also be used for this purpose, though its performance is inferior to that of TaC. Tantalum is a major additive in steel; microalloying steel with tantalum helps to refine the grain structure of the steel, thereby increasing its strength and toughness. Approximately 75% of tantalum is used in this field. Tantalum is also utilized as a superconducting material. Nb-Ti alloys are the most widely used and extensively applied superconducting materials today; examples include Nb47Ti. They have important applications in high-energy physics and are the preferred superconducting materials for large hadron colliders, heavy-ion colliders, and other high-energy particle accelerators ； Nb3Sn is the second most practical superconducting material after Nb-Ti. 9 Tantalum oxide and niobium oxide are the raw materials used for manufacturing tantalum and niobium-based synthetic crystals. Ta2O5 and Nb2O5 serve as raw materials for producing crystals such as LT and LN, which are important piezoelectric, thermoelectric, and nonlinear optical materials with significant applications in fields such as lasers and microacoustic surface waves. 10 Applications of niobium in the nuclear industry: Niobium has a low neutron capture cross-section, high thermal conductivity, and high strength; it is used in nuclear reactors as material for nuclear fuel cladding, additives in nuclear fuel alloys, and structural materials for heat exchangers. Tantalum forms a dense, stable amorphous oxide film with high dielectric strength on its surface, which facilitates precise and easy control over the anodization process for capacitors. Additionally, tantalum powder can be sintered to produce materials with a large surface area despite having a small volume. As a result, tantalum capacitors are compact, have high capacitance, low leakage current, a long service life, and excellent overall performance. They are the best type of capacitor – not only do they offer smaller size, higher capacitance, and more stable performance compared to ceramic, aluminum, and film capacitors under normal conditions, but they can also function properly in severe conditions where other capacitors cannot. Due to the excellent properties that tantalum capacitors possess, which are unmatched by many other types of capacitors, and given that there are almost no alternative capacitors that can compete with them in the fields of microelectronics and surface-mount technology, 60–65% of tantalum is used to produce tantalum capacitors in the form of capacitor-grade tantalum powder and tantalum wire. Tantalum capacitors are increasingly being used in various fields and technological sectors such as communications (programmable computers, switches, mobile phones, pagers, fax machines, cordless phones), computers, automobiles, household and office appliances, instruments, aerospace, and defense industries. The main application areas of tantalum capacitors are listed in Table 4. Application examples include:
**Communications**: Program-controlled switches, dedicated switches, mobile phones, pagers, cordless phones, fax machines.
**Computers**: Computers, chips, hard disk drives, floppy disk drives, fax decoders, and other plug-in cards.
**Automotive industry**: Engine control, fuel control, exhaust emission control, noise control, braking systems, airbags, collision avoidance systems, audio systems, car TVs, on-board diagnostic systems for vehicles, systems for optimizing vehicle design, and computerized systems for testing vehicle performance.
**Home and office appliances**: Color TVs, LCD TVs, video recorders, stereo systems, CD players, VCD players, video cameras, portable players, radios, fax machines, copiers.
**Instruments and equipment**: Instruments used in oil exploration, as well as various other instruments for experiments and production.
**Aerospace industry**: Space shuttles, commercial aircraft, satellite launches.
**Defense and military industry**: Modern weapons and equipment. Since niobium and tantalum belong to the same group of related metals and share many similar properties, capacitors made from these materials have performance second only to those made from tantalum. Compared to aluminum capacitors, they offer advantages such as higher specific capacity, lower equivalent series resistance, and easier integration into chip-based designs; it is possible that they could replace around 10% of aluminum capacitors over time ； Compared to tantalum, the main disadvantage of niobium for use in capacitors is its high leakage current (usually 5 to 10 times that of tantalum) and low breakdown voltage