Journal
CHEMICAL ENGINEERING JOURNAL
Volume 335, Issue -, Pages 255-266Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2017.10.172
Keywords
Water-borne epoxy resin; Polydopamine coated graphene oxide; Corrosion protection; Electrochemical measurement
Categories
Funding
- Strategic Priority Research Program of the Chinese Academy of Sciences - China [XDA13040601]
- National Key Basic Research Program of China - China [2014CB643302]
- One Hundred Talented People of The Chinese Academy of Sciences - China [Y60707WR04]
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This study reports an eco-friendly water-borne epoxy (EP) with enhanced corrosion protection performance by embedding graphene oxide (GO). For this purpose, the dispersion of the GO in ethanol is improved by modifying the GO nanosheets with hydrophilic dopamine (DA), owing to the p-p interactions between the GO and selfpolymerized polydopamine (PDA) as well as the covalent bonding between DA and GO. Results obtained from transmittance electron microscopy (TEM), scanning probe microscopy (SPM) Fourier transform infrared (FT-IR) spectroscopy, Raman spectroscopy, UV-vis absorbance spectroscopy and X-ray photoelectron spectroscopy (XPS) reveal the successful modification of PDA on the surface of GO nanosheets. Besides, the GO/ EP and GOPDA/ EP coatings are applied on the steel substrates and their corrosion protection performance is investigated via electrochemical measurements, scanning electron microscopy (SEM) and scanning vibration electrochemical technology (SVET). Results demonstrate that inclusion of well-dispersed GO-PDA nanosheets leads to the remarkable improvement in the corrosion protection performance of water-borne EP coating.
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