Amol University of Special Modern Technologies Caspian Journal of Engineering Modern Technologies 3060-5709 1 1 2024 06 01 Fabrication of Low-Cost Superhydrophobic Coating on Low-Carbon Steel Using Liquid Flame Spray 35 44 196682 EN Mohammad Abolhassan Araghi Mechanical Engineering, University of Tehran, Tehran, Iran Seyed Farshid Chini Mechanical Engineering, University of Tehran, Tehran, Iran Journal Article 2023 05 19 <em>A nano-engineered superhydrophobic coating was fabricated using a two-step and low-cost method employing a liquid oxy-acetylene flame spray mechanism on mild A516 steel. Oxygen and acetylene were used as flammable gases. Nanostructured coating is obtained by flame spraying aluminum nitrate solved in ethanol on the substrate. To lower the surface energy, Perfluorodecyltriethoxysilane [PFDTES] and silicone elastomer were used. Results revealed that the wettability of the surface strongly depends on the precursor concentration so that at 3.5% concentration of aluminum nitrate in ethanol, maximum contact angle [157°] occurs. The distance between the substrate and nozzle is another key parameter to control and it directly affects the contact angle. Sandpaper abrasion test showed outstanding mechanical durability so that the coating maintained in hydrophobicity range under the load of 100 grams of weight and moving 10 cm on sandpaper 1000 grit for 8 cycles. The parameters affecting the process were thoroughly analyzed according to the applied liquid flame spray mechanism and the appropriate performance range of each was obtained that According to the experiments, the precursor flowrate and the distance between the substrate and nozzle should be repectively 0.9-1.9 ml/min and 14-22 cm.</em> https://cjemt.ausmt.ac.ir/article_196682_d401d9564e69f4bd38e86c87a7c518ce.pdf