Talk about cold spray corrosion prevention technology
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Let’s discuss cold spray corrosion prevention technology. In this technology, the kinetic energy of solid particles accelerated by ultrasound is converted into heat energy upon impact with the surface of the coated part, thereby enabling metallurgical welding. Cold spraying can directly produce a thick aluminum coating on magnesium alloys, thereby reducing or eliminating electrocorrosion. This technology is expected to overcome the shortcomings of existing magnesium alloy corrosion protection methods. Its principle is that each metal has its own specific, temperature-dependent critical particle velocity; when the particles move faster than this velocity, they will weld themselves to the coated surface. In traditional thermal spraying processes, due to the high temperatures, both the coating and the base material undergo oxidation, experience metallurgical deformation, and develop residual tensile stress. Conversely, the coatings produced by the cold spraying process have a very low porosity
Cold spray technology is a new type of anti-corrosion technique that involves accelerating solid particles to supersonic speeds and directing them at the surface of the coated material; metallurgical welding is achieved through the heat generated by these collisions. This method can form a thick aluminum coating on magnesium alloys, effectively reducing or eliminating electrochemical corrosion. Compared with traditional high-temperature thermal spraying, cold spraying does not cause material oxidation or metallurgical deformation; the resulting coating has low porosity and strong adhesion, thereby providing superior protective properties. .