Study on Synthesis of Doped Polyaniline with Alumina and its Anticorrosion Properties as an Additive in Paint Coating

Document Type : Research Article

Authors

1 Department of Chemical Engineering, Ayatollah Amoli Branch, Islamic Azad University, Amol, I.R. IRAN

2 Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Shariati Ave., Babol, I.R. IRAN

3 Department of Chemical Engineering, Tarbiat Modarres University, Tehran, I.R. IRAN

Abstract

In this study, polyaniline nanocomposite with aluminum oxide (PANI/Al2O3) was synthesized in situ polymerization method and the anti-corrosion ability of nanocomposite was investigated. Products were identified by chemical analysis of Fourier Transform InfraRed (FT-IR) spectroscopy, X-ray crystallography (XRD), and thermal weighing calorimetric analysis (TGA). Also, anti-corrosion properties were analyzed by Open Circuit Potential (OCP)analysis, Electrochemical Impedance Spectroscopy (EIS), and potentiodynamic polarization curves. To investigate anti-corrosion performance, different percentages of nanocomposites (3, 6, 9, and 12 %) were added to industrial paint and applied to steel sheets as a coating. The results of corrosion performance illustrated that the steel sheets coated with PANI/Al2O3 nanocomposites along with the paint, have less corrosion compared to the samples of pure steel sheets and the cases coated with PANI/Al2O3 nanocomposites. Also, the 6 % coating containing PANI/Al2O3 nanocomposite along with paint on steel sheets showed the best anti-corrosion properties. The open-circuit potential analysis results make it clear that the coatings containing PANI/Al2O3 nanocomposite with paint have a higher performance compared to pure paint coatings in 3 wt% NaCl solution. EIS analysis revealed resistance of the coating containing 6 % PANI/Al2O3 along with the paint is more than other samples in 3 % NaCl solution.

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References

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Iranian Journal of Chemistry and Chemical Engineering
Volume 42, Issue 10 - Serial Number 132
October 2023
Pages 3257-3266

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