What is Supersonic Spraying Technology

       What is Supersonic Spray Technology? The following thermal spraying manufacturers will introduce its related content to you:



Supersonic spraying has the advantages of high production efficiency, low production cost, and low workpiece heating. It should be widely used in long-lasting anti-corrosion and wear-resistant coatings and plays an important role in thermal spraying. But comparisons were made with plasma spray and HVOF. The quality of ordinary arc spraying coating is low, the comprehensive strength is about 20mpa, and the porosity is 3%-10%, which limits the application of arc spraying. Supersonic spraying technology uses nozzles to improve the atomization effect of the spray gun, improve the accelerated flow of air to particles, and increase the speed of particles to supersonic speed. The prepared coating has high bonding strength, low porosity and low surface roughness. Compared with ordinary arc spraying, the coating quality has been greatly improved, approaching the level of plasma spraying, and the quality of arc spraying coating has been comprehensively improved.

The principle of supersonic spraying is that the arc combustion at the end of the silk will melt the uniformly supplied silk, and the supersonic airflow behind the nozzle speed will atomize the melted silk into particles of uniform size. Spray on the workpiece to form a coating. Like ordinary arc spraying, supersonic arc spraying is a continuous and repeated process of melting, atomization and deposition. However, in the atomization mode, supersonic arc spraying is different from ordinary arc spraying. Subsonic atomization, supersonic arc spraying adopts supersonic atomization. The atomized particles are fine and uniform, and the speed is fast, which is conducive to obtaining high-quality coatings.

Application of Supersonic Arc Spraying in Remanufacturing



The supersonic arc spray coating has high bonding strength, low porosity, low surface roughness, good wear resistance and corrosion resistance. It has broad application prospects in industry, especially in long-term anti-corrosion and wear-resistant coatings. The HVOF process is flexible and can achieve excellent coatings over a considerable range of process parameters. After the successful development of the equipment, it has been widely used.







Long-lasting anti-corrosion coating



Arc sprayed aluminum-zinc coating has good corrosion resistance and good protection to the substrate. Since the self-corrosion potential of aluminum and zinc coatings is lower than that of carbon steel, aluminum and zinc coatings have cathodic protection at the expense of the anode. Even if the coating is partially broken, it still has a good protective effect on the substrate. In addition, arc sprayed nickel-chromium and iron-chromium-aluminum coatings are also effective against high temperature corrosion. The coating quality of supersonic arc spraying is higher than that of ordinary arc spraying, the coating is uniform and dense, and the porosity is low. It provides a low-cost and effective method for anti-corrosion of bridges, steel towers, sluices, and industrial boilers.







Corrosion of water-cooled tube walls in industrial boilers is an important economic and technical problem. Replacing the pipe wall and the loss of production downtime can be quite expensive. During the use of the boiler, the working temperature is high and the fuel sulfur content is high. In the high temperature air, the iron element reacts with the sulfur element to form fe s, which causes the boiler water cooling tube wall to corrode. In addition, the slag and ash have an erosive effect on the pipe wall, which aggravates the corrosion of the pipe wall. Compared with ordinary arc spraying, the supersonic arc spraying of the water-cooled pipe wall of the power plant has a uniform and dense coating, low surface roughness, high bonding strength, and greatly improved coating quality. Anti-corrosion life is expected to be more than 5 years. With the development of the petrochemical industry, the accidents of chemical storage tanks and pipelines caused by various corrosion reasons show an obvious upward trend, which not only causes a large number of economic losses and environmental pollution, but also causes a large number of casualties. Therefore, the maintenance of chemical equipment is one of the key issues in the development of the petrochemical industry. The light oil recovery tank of the supersonic arc spraying petrochemical plant has greatly improved the service life of the recovery tank, and its service life has been increased from the original 3 years to 8 years.