Views: 0 Author: Site Editor Publish Time: 2024-11-11 Origin: Site
Thermal spraying technology can spray a variety of materials to cope with different types of corrosive environment, the following list some common used as anti-corrosion coating substances, they can effectively resist the erosion of various types of corrosive media, general thermal spraying technology can spray what common corrosive substances?
1, zinc (Zn) and zinc alloy: zinc is one of the common thermal spraying materials, especially pure zinc and zinc aluminum alloy, can provide anode sacrifice protection for the steel matrix, especially in the atmosphere and seawater environment good performance.
2, aluminum (Al) : aluminum coating can form a dense oxide film, which has good corrosion resistance to seawater, atmosphere, weak acid and weak alkali environment. It is commonly used for anti-corrosion protection of offshore facilities and oil pipelines.
3, stainless steel (SS) : such as SS304, SS316L and other austenitic stainless steel, because of its own passivation properties, can effectively resist most inorganic acids, alkali solutions and salt water corrosion, suitable for food processing, pharmaceutical and other industry applications.
4, nickel (Ni) and nickel alloys: such as Inconel, Monel series alloys, with excellent corrosion resistance, can resist chloride stress corrosion cracking, suitable for high temperature and strong corrosive media environment, such as petrochemical, Marine engineering, etc.
5, chromium (Cr) : chromium coating hard and wear-resistant, dilute sulfuric acid, nitric acid and other inorganic acids have a certain resistance, often used in the dual requirements of anti-corrosion wear occasions.
6, copper (Cu)** and its alloys: such as brass, bronze, non-oxidizing acid, alkali solution has a good tolerance, but because it is easy to produce blue green copper rust, the scope of application has certain limitations.
7, ceramic coating: such as alumina (Al₂O₃), zirconia (ZrO₂), with good high temperature corrosion resistance, can be used for harsh environment, such as flue gas, high temperature burning ash corrosion protection.
8, composite materials: the combination of the above metal and other elements, such as Ni-Cr-Al-Y, ZrO₂-TiO₂ and other composite coatings, can simultaneously have high strength, corrosion resistance, high temperature and other advantages.