Laser texturing is a modern method for synthesizing superhydrophobic surfaces that have special properties. In this assignment, the transition from superhydrophilic to superhydrophobic state of surface of laser textured samples from stainless steel 316L was observed. At the same time, a detailed analysis of the effects of the achieved state on the corrosion resistance in an aggressive chloride environment was carried out. For texturing we used the marking Nd:YAG laser with a wavelength of 1048 nm, which is cheaper than femtosecond laser. 4 samples were textured and exposed each for a limited period of time to room atmosphere, and monitor the occurrence of hyperphobicity with contact angle measurements and EDS analisys. The electrochemical corrosion tests followed; the corrosion potential, linear polarization resistance and cyclic polarization. The intensity of corrosion attacks was evaluated using a quantitative analysis with the ImageJ program. We analyzed the relative proportion of corrosion, the circulatrity of corrosion pit, and the angle from the second laser beam transition. The results of electrochemical tests show that the transition from superhydrophilic to superhydrophobic conditions improves corrosion properties. Immediately after laser texturing, the corrosion resistance was the lowest, but with the development of hydrophobicity, it improved, which was also confirmed by the quantitative analysis on metallographic images of the corroded surfaces. The most important synthesis of the task is that with a relatively cheap laser texturing method it is possible to produce superhydrophobic surfaces on which a drop of water does not spill and have improved corrosion properties.
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