Preparation and Properties of Fatty Acid Salt Superhydrophobic Coatings

In order to explore the differences of microstructure，composition and performances of different fatty acid salt superhydrophobic coatings，three kinds of fatty acid salt superhydrophobic coatings were prepared by electrodeposition on rough surface of TC4 alloy.The microstructure，chemical composition，phase and wettability of such superhydrophobic coatings were characterized and analyzed by scanning electron microscopy，X-ray diffraction，X-ray photoelectron spectroscopy，Fourier transform infrared spectroscopy and contact angle tester.The wear resistance，heat resistance and corrosion resistance of the superhydrophobic coatings were investigated by linear friction test，long time heating experiment and electrochemical experiment respectively.Results showed that fatty acid salt coatings obtained by anodic and cathodic deposition both had non-adhesion superhydrophobicity.The surface color and state of the three fatty acid salt coatings were different，but the micromorphology was all ＂cauliflower＂ cluster，and there was an obvious micro nano hierarchical structure.The wear resistance and heat resistance of the three superhydrophobic coatings were different due to different fatty acid salts.Corrosion resistance of three superhydrophobic coatings was better than that of the substrate.CSHS-Cu had the best corrosion resistance.The Jcorr of CSHS-Cu was 1/5 of that of the bare substrate，and its Rct was 25 times that of the bare substrate.