Corrosion study of the graphene oxide and reduced graphene oxide-based epoxy coatings

This work aims to determine the effect of graphene oxide (GO) and reduced graphene oxide (rGO) incorporation as filler on the corrosion protection ability of epoxy coatings in saline media. GO was derived from graphite powder following modified Hummers' method, whereas rGO was obtained after re...

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Bibliographic Details
Published in:Materials research express 2017-12, Vol.4 (12), p.125601
Main Authors: Ghauri, Faizan Ali, Raza, Mohsin Ali, Baig, Muhammad Saad, Ibrahim, Shoaib
Format: Article
Language:English
Subjects:
coatings
electrochemical impedance spectroscopy
graphene oxide
reduced graphene oxide
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Summary:This work aims to determine the effect of graphene oxide (GO) and reduced graphene oxide (rGO) incorporation as filler on the corrosion protection ability of epoxy coatings in saline media. GO was derived from graphite powder following modified Hummers' method, whereas rGO was obtained after reduction of GO with hydrazine solution. About 1 wt.% of GO or rGO were incorporated in epoxy resin by solution mixing process followed by ball milling. GO and rGO-based epoxy composite coatings were coated on mild steel substrates using film coater. The coated samples were characterized by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization tests after 1 and 24 h immersion in 3.5% NaCl. The results suggested that GO-based epoxy composite coatings showed high impedance and low corrosion rate.
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/aa9aac