What is it about?
This paper describes the principle of operation as well as area of application of cold spraying process.
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Why is it important?
Application of protective coatings on the surface of machine parts is increasingly and more widely used in different industrial applications. The main function of protective coating is remaining useful life extension of mechanical parts due to increased resistance to erosion, abrasion, oxidation, corrosion, etc. The cold spraying process is a coating deposition technique in which solid powders are accelerated toward a substrate. Powder particles are accelerated to very high velocities by the high speed gas stream, whereby the temperature of the gas stream is always below the particle material’s melting point. Due to the relatively low heat input and temperature during cold spraying process, this process can be successfully applied in the case of materials that are susceptible to oxidation (Al, Cu, Ti, etc.) and dissolution (WC, SiC, etc.) at high temperatures.
Perspectives
In comparison with other thermal spraying process, cold spraying stands out as a process with the lowest temperature during protective coating deposition. Cold spraying is widely used in different industries primarily due to the exceptional quality of the coating.
Professor Milos B. Djukic
University of Belgrade, Faculty of Mechanical Engineering
Read the Original
This page is a summary of: Hladna metalizacija, January 2017, Singidunum University,
DOI: 10.15308/sinteza-2017-343-348.
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