Polymeric coatings obtained by Cold Gas Spray

Innovation in polymers and in obtaining polymeric nanocomposites are experiencing global growth since they are widely used in a wide range of industries, for example: automotive, aircraft and shipbuilding industries. Thermoplastic material represents 70-80% of global consumption of plastic, due to their excellent chemical resistance to acids and bases, corrosion resistance or hydrophobicity properties. Among all different methodologies to obtain polymeric coatings, thermal spray technology is an economical alternative and they show minor environmental impact. In comparison to conventional procedures, that need thermal treatments or solvent application that produce volatile organic compound (VOC), cold gas spray (CGS) technology is one-step method to obtain polymeric coatings based on solid-state feedstock deposition. In addition, CGS is a green and economically affordable technology to obtain efficient coatings, enabling the reduction of surface treatments and the possibility of increasing parts service. The aim of this work is the study of the feasibility of using a subsonic nozzle for the deposition of polymeric coatings by CGS. In addition, a comparison of the effect of nozzle diameter and particle velocity on coating properties was carried out, in order to obtain optimal polymer coatings. For this study, coatings morphology, superficial roughness and antifouling properties were characterized.