Morphological Features and Electrochemical Properties of the Hydrophobized Sealed PEO-Coatings on Al Alloy

Abstract:

The developed methods of formation and results of the study of the hydrophobic layers on aluminum alloy, previously subjected to plasma electrolytic oxidation (PEO), boiling in bidistilled water, and additional treatment (either in ethanol solution or under UV-radiation in the presence of ozone plasma) with subsequent deposition of the hydrophobic agent (methoxy-{3-[(2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluoroctyl) oxy] propyl}-silane solution in decane) have been described. It was found, that the formed composite layers possess hydrophobicity (contact angle higher 155o) and high anticorrosion properties (the impedance modulus (|Z|_{f = 0.01 Hz}) ranges from 1.5·10⁸ to 1.7·10⁸ Оhm·cm² depending on treatment procedure).

• Periodical: Solid State Phenomena (Volume 245)
• Pages: 137-143
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.245.137
• Online since: October 2015
• Authors: Vladimir S. Egorkin, Igor E. Vyaliy, Alexander N. Minaev, Sergey L. Sinebryukhov, Sergey V. Gnedenkov
• Keywords: Aluminium, Electrochemical Impedance Spectroscopy, Hydrophobicity, Plasma Electrolytic Oxidation, Protective Coatings, Wettability

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