There are many kinds of corrosion-resistant materials, but what are the most corrosive-resistant materials? The following will be a grand introduction to the world's four corrosion-resistant materials:
Teflon merchandise named "Teflon" (Teflon,Flu on), Jane PTEE or F4, commonly known as plastic King, is the world's most corrosion-resistant materials of alum, is one of the production of liquid gas pipelines, heat exchangers and other content equipment, the ideal sealing materials connection.
Tetrafluoroethylene [PTFE,F4] is one of the best corrosion-resistant materials in the world today, so the "plastic king" is laudatory. It can be used in any kind of chemical medium for a long time, it has solved many problems in the field of chemical industry, petroleum, pharmacy and so on. PTFE seals, washers, gaskets. PTFE seals, gaskets, sealing gaskets are selected suspension polymerization PTFE resin molding processing. Compared with other plastics, PTFE has excellent chemical resistance and temperature resistance, it has been widely used as sealing material and filler material.
It is a macromolecule polymer formed by tetrafluoroethylene, with excellent chemical stability, corrosion resistance, sealing, high lubrication, electrical insulation and good anti-aging endurance. can be at + 250 ℃ to-180 ℃ temperature for a long-term work, in addition to molten metal sodium and liquid fluorine, ability of all other chemicals, in the aqua Regia boiling also does not change.
At present, all kinds of PTFE products have been in the chemical industry, machinery, electronics, electrical appliances, military, aerospace, environmental protection and bridges and other fields of national economy play a pivotal role.
2. Carbon fiber
Carbon fibre is a fibrous carbon material with more than 90% carbon content, and it is one of the most corrosive-resistant materials.
Carbon fiber (carbon fiber, abbreviated CF) is a new fiber material with high strength and modulus fibers with carbon content over 95%%. It is made of flake graphite micro-crystalline and other organic fibers along the direction of the axial pile of fiber, carbide and graphite processing of microcrystalline ink. Carbon fiber "velvet glove", the quality is lighter than aluminum, but the strength is higher than steel, and has corrosion resistance, high modulus characteristics, in the defense industry and civil aspects are important materials. It not only has the intrinsic characteristic of carbon material, but also has the softness and machinability of textile fibers, which is a new generation of reinforced fibers.
Carbon fibers have many excellent properties, and the axial strength and modulus of carbon fibers are high, low density, high performance, no creep, non-oxidizing environment, high-temperature resistance, good fatigue resistance, heat and conductivity between non-metallic and metal, thermal expansion coefficient is small and the anisotropy, good corrosion resistance, X-ray transmittance is good. Good conductive heat conduction performance, electromagnetic shielding and so on.
Compared with the traditional glass fiber, the Young's modulus is 3 times times more than that of the fiber. Compared with Kevlar fibers, Young's modulus is about twice times, in organic solvents, acids, alkali insoluble, corrosion resistance prominent.
III. Copper oxide
Copper oxide is currently the most corrosion resistant material. Sweden has been a world leader in the field of nuclear waste disposal, and the country's technicians are now using a new type of copper-oxide container to store nuclear wastes, which can guarantee safe storage for 100,000 years.
Copper oxide (CuO) is a copper black oxide, slightly more bisexual, slightly hygroscopic. The relative molecular mass is 79.545, the density is 6.3~6.9 g/cm3, the melting point is 1326 ℃. Insoluble in water and ethanol, soluble in acid, ammonium chloride and potassium cyanide solution, ammonia solution slowly dissolved, can react with strong alkali. Copper oxide is mainly used in rayon, ceramics, glaze and enamel, batteries, petroleum desulfurizer, pesticides, also for hydrogen, catalysts, green glass and so on.
Platinum property is stable, at ambient temperature not with hydrochloric acid, nitric acid, sulfuric acid and organic acids, there is "the most corrosion-resistant metals" This is called, but dissolved in aqua regia. Titanium is considered to be non-corrosive and eroded because it is easy to form a stable titanium oxide (TiO2) protective film.
Platinum (Platinum, abbreviation PT), is a naturally formed white precious metal. Platinum, early in the 700 in the history of human civilization, flashing dazzling light in the human use of platinum more than 2000 years of history, it has been considered one of the most noble metals.
The properties of platinum are very stable, and will not deteriorate or fade because of daily wear, and its luster is always the same. Even with the common acidic substances in life, such as the hot springs of sulfur, bleach, chlorine in the pool, or sweat, etc., will not be affected, so can be at any time very reassuring to wear platinum jewelry. No matter how long it wears, platinum can always keep its natural white luster and never fade.