| Abstract: |
Polymer coatings are used to protect parts from corrosion and wear, as well as for electrical insulation and sealing joints. Also, their ability to damp vibrations, and low density are used at design of a wide range of mechanical systems. Adding different fillers to the original polymer powder allows to purposefully change the properties of the coatings. Flame spraying gun TERKO-P was used. It provides spraying of powders with a melting point of 350-650 K, fractions of 200-400 microns and a productivity of 3 kg/h. In this case, an insignificant thermal destruction takes place due to a low powder overheating at spraying above its melting temperature. Durability of the coatings is mainly determined by an adhesion strength. In addition to well-known substrate preheating, the adhesion strength is also affected by other factors. In the study, rational intervals of the following parameters were determined: a type of polymer including polyamide, low pressure polyethylene, high pressure low density polyethylene, polyethylene terephthalate; a type and a share of inorganic fillers including glass ceramics and aluminum powder; a fraction of polymer powders; an oxidizer-to-fuel ratio of propane-air mixture used as a heating source. Some applications of study results are shown.
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