China. Scientists from the Chinese Academy of Sciences and Shenyang University of Chemical Technology presented an analysis of the addition of tetraanylin-based conductive nanofiber (TANF) to the anticorrosive properties of water-based epoxy coatings on Q235 mild steel.
The TANF nanofiber was synthesized by self-assembly of tetraaniline in a solution of HCl 1M. The structure of TANF was characterized by the infrared pattern of Fourier transformation (FT-IR), Raman, X-ray diffraction (XRD), UV-vis spectrum, and photoelectronic spectroscopy (XPS), and the morphology of TANF was used for scanning electron microscope (SEM) and scanning probe microscope (SPM) research.
Self-assembled TANF possesses excellent solubility, a small nanofibrous structure and reversible redox behavior, making it appropriate as a new anticorrosive pigment for water-based coatings. Impedance spectroscopy (EIS), polarization curves, and scanning vibration electrodes (SVET) techniques were used to investigate the effect of TANF on the anticorrosive performance of epoxy coatings.
The results revealed that this type of coating containing 0.5% weight of TANF exhibited improved corrosion resistance properties compared to pure water-based epoxy coating. The addition of electroactive TANI could facilitate the formation of a passive metal oxide layer under the coating, as evidenced by the characterization of the X-ray diffraction oxide (XRD) layers.
Source: Science Direct.
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