Preparation and Anti-Corrosion Properties of Conductive Polyaniline/Waterborne Epoxy Resin Coatings

Chinese Journal of Materials Research

2013, Vol. 27

Issue (4): 432-438 DOI:

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Preparation and Anti-Corrosion Properties of Conductive Polyaniline/Waterborne Epoxy Resin Coatings

WANG Na^{1, 2} CHENG Keqi¹ WU Hang³ WANG Fuhui^{2, 3*}

1. School of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142
2. School of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001
3. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of
Sciences, Shenyang 110016

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WANG Na,CHENG Keqi WU Hang WANG Fuhui,*. Preparation and Anti-Corrosion Properties of Conductive Polyaniline/Waterborne Epoxy Resin Coatings. Chinese Journal of Materials Research, 2013, 27(4): 432-438.

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Abstract The waterborne anti-corrosion paint was prepared by introducing the anti-corrosion pigment of conductive polyaniline (PANI) to the waterborne epoxy. Adding quantity (mass fraction) of PANI was 0, 0.2%, 0.4%, 0.6%, 0.8%, respectively. The dispersion and anti-corrosion effect were characterized with optical microscopic, electrochemical impedance spectroscopy (EIS), polarization curve analysis (LSV), X-ray diffraction (XRD), and salt spray test. The effects of the quantity of PANI on the anti-corrosion property of the waterborne anti-corrosion paint were investigated. The anodic and cathodic reaction can be insulated because of the suitable PANI adding, and the metal chelating substance and the shielding effect of oxygen are helpful. Metal oxide film formed intactly and the coating “flash” rust resistance and anti-corrosion effect can be improved. But when the adding amount of PANI was 0.8%, the effect of anti-corrosion decreased because the shielding the corrosion ions of the epoxy film decreased. The anti-corrosion property is the best when the quantity of PANI was 0.6%. The PANI can improve the quality of the oxidation film, and overcome the “flash rust” problem effectively.

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