OICC Press Journal of Theoretical and Applied Physics 2251-7235 18 2 2024 03 10 Modification of painted steel surfaces in different thicknesses by cold plasma to increase extraction of water from the air 10.57647/j.jtap.2024.1802.27 EN Shadi Sabzevari Shahid Beheshti University, Tehran, Iran 0000-0002-0763-2807 Mohammad Hossein Mohajer Shahid Beheshti University, Tehran, Iran Motahare Monfaredi Shahid Beheshti University, Tehran, Iran Mohammad Sajad Nikouei Fard Shahid Beheshti University, Tehran, Iran Hamid Reza Qomi Shahid Beheshti University, Tehran, Iran 0000-0001-5713-6804 Journal Article 2024 03 10 In recent years, extracting water from the air in hot and humid areas has been studied as a clean and optimal way to supply fresh water. In this research, painted steel surfaces were modified by vacuum plasma, and hydrophilic and hydrophobic grooves were made on them in millimeter scale. Then, by building a steam reactor, the parts were tested to extract water from the air and it was observed that modifying the surfaces increases the amount of water produced several times. Next, the optimal thickness of the paint on the steels was determined.