In this study, polyaniline (PANI) nanocomposites containing metal oxide nanoparticles such as SnO2 with different ratios (0.1, 0.25, 0.5, and 1.0 g) were successfully synthesized by in‐situ polymerization for improving the corrosion efficiency of PANI. The synthesized polymeric nanocomposites have been characterized by Fourier transform infrared (FTIR) spectroscopy, X‐ray diffraction pattern (XRD), scanning electron microscopy (SEM), thermal gravimetric analysis, and differential scanning calorimetry analysis techniques. Furthermore in order to, enhance the mechanical and barrier properties of PANI matrix, PANI nanocomposites in the presence of metal oxide nanoparticles were mixed with epoxy resin such as polyvinyl butyral and applied as additives in the PANI matrix. PANI/epoxy/metal oxide polymeric nanocomposites were prepared as a thin layer coating and applied on polished AISI 304 stainless steel substrates. The corrosion protection efficiency of the freshly prepared SnO2 containing PANI nanocomposites were investigated by potentiodynamic polarization and electrochemical impedance spectroscopy in 3.5 wt%. NaCl solution. The surface morphology and the structure of the film were evaluated by SEM. Finally, the obtained results revealed that PANI/epoxy/SnO2 metal oxide nanocomposites coatings provided a significant protection against corrosive environment. POLYM. COMPOS., 39:E2415–E2425, 2018. © 2018 Society of Plastics Engineers
SYNTHESIS, CHARACTERIZATION OF PANI/EPOXY AND PANI/ZnO/EPOXY POLYMERIC COMPOSITES AND INVESTIGATION OF THEIR CORROSION BEHAVIOR ON STEEL L304ABSTRACT In this study, we have prepared polyaniline (PANI) and PANI/ZnO composites containing different ratios (0.1g, 0.25g, 0.5g, 1.0g) nano ZnO by chemically. The structure of polymeric nanocomposites which prepared in the form of granules was characterized by TGA, FTIR, and SEM. In order to protect steel L304from corrosion, metal surfaces were covered with PANI, PANI/nano metal oxide polymeric composites that dissolved in the polyvinyl butyral (PVB), anti-corrosion properties of PANI/Epoxy films and PANI/ZnO/Epoksi polymeric composite films consisting on metal surfaces was determined by potentiodynamic polarization measurements in 3.5% NaCl solution. From the obtained results, by the addition of epoxy resin containing nano ZnO the polymeric composite that coated to surface has been determined to be more effective at protecting steel from corrosion than PANI/Epoxy coating.
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