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Analysis of Deposition Process for Composite Polymer Thermally Sprayed Coatings


 An important factor in the process of formation of a metal-polymer coating is the effect of a high-temperature gas jet on the "coating-substrate" system, as the jet favours penetration and spread of a polymeric material over the surface of the substrate. It is this factor that makes this form of thermal spraying radically different from spraying metallic coatings. On the other hand, excessive heating of the surface can lead to oxidation and degradation of the polymeric component. Therefore, thermal phenomena taking place during the formation of thermal sprayed metal-polymeric coatings, i.e. the level and distribution of temperatures through the thickness of a coating were analysed. Based on the results of mathematical modeling, recommendations for the thermal spraying of metal-polymeric coatings (heat source speed, spraying distance, flow rate of working gases, etc.) were developed.