Corrosion protection of copper by silane sol–gel coatings
作者： S. Adhami , M. Atapour , A. R. Allafchian
DOI: 10.1007/S10971-015-3665-9
关键词: Infrared spectroscopy 、 Silane 、 Coating 、 Sol-gel 、 Copper 、 Metallurgy 、 Corrosion 、 Scanning electron microscope 、 Chemical engineering 、 Dielectric spectroscopy 、 Materials science
摘要: The corrosion protection of three silane-based coatings on copper substrate was investigated in 3.5 % NaCl solution. For this purpose, tetraethoxysilane (TEOS), 3-tri-methoxysilyl-1-propanethiol (TPS) and a hybrid TEOS + TPS were coated onto Cu by the sol–gel deposition method. behavior uncoated specimens evaluated using potentiodynamic polarization, electrochemical impedance spectroscopy immersion tests. Furthermore, surface morphologies chemical compositions assessed atomic force microscopy (AFM), scanning electron Fourier transform infrared spectrometer (ATR-FTIR). results indicated that coating exhibited best performance as compared with single TEOS TPS coatings. This ascribed to simultaneous formation strong Cu–S cross-link Si–O–Si bonds according ATR-FTIR observations. topography studies AFM after 120-h demonstrated heavy degradation case TEOS. In contrast, produced homogenous highly adherent protective nanostructure (75–250 nm) substrates. three-dimensional images TEOS-, TPS- TEOS + TPS-coated (a, c e) before (b, d f) (w) solution for 120 h.
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