Preprint Article Version 1 This version is not peer-reviewed

Investigation of Corrosion Resistance of poly(o-phenylenediamine)-ZnO Composites on Carbon Steel

Version 1 : Received: 11 December 2018 / Approved: 12 December 2018 / Online: 12 December 2018 (11:12:44 CET)

How to cite: Zhou, C.; Zhou, C.; Zhang, J. Investigation of Corrosion Resistance of poly(o-phenylenediamine)-ZnO Composites on Carbon Steel. Preprints 2018, 2018120141 (doi: 10.20944/preprints201812.0141.v1). Zhou, C.; Zhou, C.; Zhang, J. Investigation of Corrosion Resistance of poly(o-phenylenediamine)-ZnO Composites on Carbon Steel. Preprints 2018, 2018120141 (doi: 10.20944/preprints201812.0141.v1).

Abstract

Synthesis of poly(o-phenylenediamine) (PoPD) and poly(o-phenylenediamine)-ZnO (PoPD-ZnO) nanocomposites on carbon steel by in-situ polymerization with HCl acid as doping acid Material coating. The composition and structure of PoPD-ZnO nanocomposites were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The corrosion protection ability of polymer coatings in 3.5% NaCl was studied by potentiodynamic polarization curves and electrochemical impedance spectroscopy. It can be seen from the electrochemical corrosion experimental data that PoPD-WPU coating (PWC) and PoPD-ZnO-WPU coating (PZWC) can effectively improve the corrosion resistance of the carbon steel substrate, and the corrosion rate is reduced by 2-3 orders of magnitude compared with carbon steel. The conclusion demontrates that PoPD can effectively extend the service life of carbon steel substrates. In addition, it is advantageous to form a compact and low-defect coating when added nano-particle ZnO, which is advantageous for the POPD film to develop its good barrier property and corrosion resistance.

Subject Areas

poly(o-phenylenediamine) (PoPD); ZnO; WPU; polymer coating; anticorrosion

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