Zirconium and Alloys

The Performance And Application Of Zirconium Rod

Zirconium rod is a silver-white electroplating genus, the surface is easy to form an oxide film, it is shiny, the appearance is similar to steel, and it is corrosive. Under high temperature, it can react with non-metal elements and many metal elements to form solid solution compounds. The zirconium rod has good plasticity and is easy to be processed into plates, can be drawn into zirconium wires, and can also be made into targets. When tungsten is heated, it can absorb a large amount of oxygen, hydrogen, nitrogen and other gases and used as a hydrogen storage material. The corrosion resistance of zirconium is better than that of titanium, close to niobium and tantalum.

Zirconium mainly exists in nature in the form of minerals. The error content of tungsten in the earth's crust ranks 20th, which is more than common metals such as copper, lead, nickel, and zinc. However, it is called a rare metal because the manufacturing process is more complicated and it is not easy to extract. Into the economy.among the more than 40 kinds of plutonium deposits discovered, only about 10 have industrial mining value, and only two kinds of plutonium and quadrangular pyramids are used for industrial production.

Zirconium has a wide range of applications. Zirconium accounts for about 3% to 4%, mainly in the form of zirconium silicate and zirconium oxide, which are used in ceramics and refractory materials. This part of the application accounts for more than 90% of zirconium consumption. Zirconium has excellent nuclear properties, so the thermal neutron absorption cross section is small, only 0.1810-28. One of the important uses of zirconium and its alloys is the fuel cover material and other structural materials of atomic energy reactors.the research and development of zirconium and zirconium alloys are closely related to the development of the nuclear power industry. They were first used in nuclear-powered ships and later actively developed nuclear power plants.

Zirconium rod is an active metal and has a high affinity for oxygen. The protective oxide film in the air at room temperature will form a protective oxide film. This oxide film makes tungsten and its alloys have excellent corrosion resistance. Tungsten, which has strong corrosion resistance, has strong resistance to many tin-type media, has mechanical and heat transfer properties, and has considerable cost advantages. It has become an excellent corrosion-resistant structural material in the petrochemical field.

Industrial zirconium rods are widely used in pressure vessels, heat exchangers, pipes, tanks, shafts, mixers and other mechanical equipment, valves, pumps, sprayers, trays, weapons, tower linings and other anti-corrosion process equipment. According to statistics, it is processed in the form of zirconium (or sponge zirconium) and then processed into zirconium alloy, which is suitable for nuclear fuel parts or industrial fields. In terms of processing difficulty level and technology, the metal industry chain is at a relatively good level.

Zirconium Sheet Applications

Aerospace Industry: Used in aircraft structural components, such as wings and fuselage panels, due to its lightweight nature, high strength, and corrosion resistance.

 

Chemical Processing: Employed in equipment and machinery for handling corrosive chemicals and high-temperature environments, including vessels, tanks, and heat exchangers.

 

Medical Implants: Utilized in orthopedic and dental implants due to zirconium's biocompatibility, corrosion resistance, and low allergenic potential, ensuring compatibility with the human body.

 

Nuclear Industry: Applied in nuclear reactor components, such as pressure tubes and fuel cladding, due to zirconium's low neutron absorption cross-section and excellent corrosion resistance in high-radiation environments.

 

Electronics: Utilized in electronic devices for various applications, including as substrates for semiconductor manufacturing and protective coatings for electronic components.

Best Practices for Handling and Fabricating Zirconium Sheet

Storage and Handling
Proper storage of zirconium sheet is crucial to prevent contamination and damage. Store sheets in a clean, dry area away from direct sunlight, moisture, and corrosive substances. Use pallets or racks to prevent contact with the floor and keep sheets separated to avoid scratching or deformation. When handling zirconium sheets, wear gloves to prevent fingerprints, which can affect the material's surface and subsequent fabrication processes.

Equipment Selection
When working with zirconium sheet, it's important to use appropriate tools and equipment to prevent contamination and ensure precise fabrication. Select cutting tools, saw blades, and grinding wheels specifically designed for zirconium or other reactive metals. Avoid using carbon steel or iron-based tools that can contaminate the surface and compromise the corrosion resistance of the zirconium sheet.

Cutting and Machining
Zirconium sheet can be cut using shears, band saws, or abrasive waterjets. For precision cutting, using waterjets or laser cutting is recommended. When machining zirconium, ensure proper cooling with water-based lubricants to dissipate heat and prevent overheating. Maintain low cutting speeds to minimize heat generation and avoid work hardening, which can lead to cracking or reduced ductility.

Welding and Joining
Zirconium sheet can be successfully welded using various techniques such as TIG (Tungsten Inert Gas) welding or electron beam welding. Before welding, ensure the sheet and welding area are clean and free from contaminants. Use specialized zirconium welding filler rods with matching composition to maintain the material's corrosion resistance. Strictly follow proper shielding gas techniques to prevent oxygen and nitrogen contamination during welding.

Safety Precautions
Working with zirconium sheet requires strict adherence to safety precautions due to its reactive nature. Wear appropriate personal protective equipment (PPE), including gloves, safety glasses, and protective clothing. Implement proper ventilation in the workspace to control dust and fumes. Avoid contact between zirconium and flammable materials, as it can ignite under certain conditions. In case of a fire involving zirconium, use dry powder or sand to extinguish it, as water can react explosively with zirconium at high temperatures.

Surface Finishing
Zirconium sheet surfaces can be enhanced through various finishing techniques like polishing, brushing, or electrochemical etching. However, it is essential to avoid contact with abrasive cleaning pads or brushes that can introduce contamination. Utilize specialized tools and cleaning agents specifically designed for zirconium to maintain its integrity and surface quality.

Quality Control
Implement stringent quality control measures throughout the handling and fabrication process to ensure the integrity of zirconium sheet. Conduct regular inspections to identify any signs of contamination, damage, or defects. Non-destructive testing methods such as dye penetrant testing or ultrasonic testing can be employed to detect surface cracks or flaws that may compromise the material's performance.