Electrochemical evaluation of corrosion protection performance of epoxy/polyaniline-imidazole modified ZnO nanocomposite coating on mild steel


Journal: Vol.10, No.3, Summer 2017 - Article 6   Pages :  181 Until 192



Article Code:
PCCC-2017-04-04-357

Authors:
M.Gh. Hosseini: Tabriz university - Department of Physical Chemistry,Electrochemistry Research Laboratorymistry
K. aboutalebi: tabriz university - Department of Physical Chemistry,Electrochemistry Research Laboratorymistry


Article's abstract:

In this research, ZnO nanoparticles modified with imidazole in O-xylene solution and characterized with Fourier transform infrared FTIR spectroscopy. Then, polyaniline-ZnO unmodified and imidazole modified nanocomposites were synthesized via in-situ emulsion polymerization method. The synthesized nanocomposites were characterized by FTIR and scanning electron microscopy SEM. The anti-corrosion behavior of the epoxy coating in the presence of unmodified ZnO, imidazole modified ZnO, polyaniline-ZnO unmodified and imidazole modified were studied in NaCl 3.5 wt solution at 65 ℃ for 100 h by electrochemical impedance spectroscopy EIS. The coating resistance Rcoat of epoxy coating containing unmodified ZnO, imidazole modified ZnO, polyaniline/ unmodified ZnO and polyaniline/ imidazole modified ZnO after 100 h immersion in saline electrolyte found to be 7.2×104 , 1.3×105 , 2.3×105 and 1.7×107 Ω cm2, respectively. It can be seen that polyaniline/ imidazole modified ZnO nanocomposite exhibited higher corrosion resistance and provided better barrier properties against ingress of corrosive electrolyte.


Keywords:
: Anticorrosion resin, Barrier performance, Conductive polymer, EIS, Nanopigments

References:
References [1] A.P.I. Popoola, V.S.Aigbodion, O.S.I.Fayomi, Anti-corrosion coating of mild steel using ternary Zn-ZnO-Y2O3 electro-depositon, Surface


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Manager-in-Chief:
Prof. Zahra Ranjbar
Editor-in-Chief:
Dr. Farahnaz Nourmohammadian
Assistant Editor:
Dr. Mozhgan Hosseinnezhad
ISSN:
2008-2134
ISSN (online):
2383-1790
Publisher:
Institute for Color Science and Technology (ICST)

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