Application of Thermal Spray Technology

       【Summary】:

(1) Spray corrosion-resistant coating. Thermal spraying technology can be used to spray protective coatings resistant to corrosion by various media, but the electrode potential of metal coatings such as stainless steel, nickel alloy, monel alloy, and bronze is higher than that of steel, so it is easy to produce electrochemical corrosion at the pores of the coating. It is only used for mechanical parts such as pistons and piston rods of plunger pumps, hydraulic cylinders, ship stern shafts, valves, etc., and must be sealed. (2) Spray wear-resistant coating. Thermal spraying technology has been successfully applied to spray wear-resistant coatings on the surface of mechanical parts, prolong the service life of parts, or repair mechanical parts that have lost wear and tear. as in a steam turbine

(1) Spray corrosion-resistant coating. Thermal spraying technology can be used to spray protective coatings that are resistant to corrosion by various media, but stainless steel, nickel alloys, monel alloys, bronze, etc.



The electrode potential of metal coating is higher than that of steel, so it is easy to produce electrochemical corrosion in the pores of the coating, and it is only used for mechanical parts such as piston and piston rod of plunger pump, hydraulic oil



Cylinders, ship stern shafts, valves, etc., and must be sealed. And it must be sealed. And it must be sealed.



(2) Spray wear-resistant coating. Thermal spraying technology has been successfully applied to spray wear-resistant coatings on the surface of mechanical parts, prolong the service life of parts, or repair wear loss. or repair wear loss



effective mechanical parts. For example, various iron-based or nickel-based wear-resistant alloy coatings are sprayed on sliding and wearing parts such as steam turbine rotors, seal journals, and piston rings.



(3) Spray high temperature resistant coating. Thermal spray technology can also be used to improve the high temperature oxidation resistance of mechanical parts. HVOF Cr 2 C 3 - NiCr coating,



It is a good wear-resistant coating below 900 °C, and is the main high-temperature protective coating for the bottom of continuous annealing furnaces in the metallurgical industry.



(4) Spray functional coating. Thermal spraying technology can be widely used in the electrical industry, such as spraying shielding coatings to eliminate the interference of electromagnetic waves and radio waves, while clearing the



In addition to electrostatic discharge sparks; high-level attenuation can be improved with arc spraying of zinc coatings. High-level attenuation can be enhanced by arc spraying zinc coatings.



(5) Spray molding. The use of thermal spraying to manufacture mechanical parts is a special manufacturing technology that has developed rapidly in recent years. For example, arc spraying is used to manufacture stamping plastic and leather product molds, plasma spraying ceramic or refractory metal nozzles, etc.