Electrochemical Studies on Aluminium Corrosion in Dilute Alkaline Dispersions of Graphene Oxide
Pradip Kr. Ghosh
Electrochemistry Laboratory, Department of Chemistry, Visva-Bharati University, Santiniketan-731235, India
Susanta Ghosh *
Electrochemistry Laboratory, Integrated Science Education and Research Centre, Visva-Bharati University, Santiniketan-731235, India
I. Basumallick *
Electrochemistry Laboratory, Department of Chemistry, Visva-Bharati University, Santiniketan-731235, India
*Author to whom correspondence should be addressed.
Abstract
Graphene Oxide (GO) sheet with different degree of exfoliation has been prepared by modified Hummers’ method. These exfoliated GO sheets have been characterized by UV–VIS, FTIR, powder XRD, Raman, Fluorescence, SAED spectroscopy and HR-TEM. Effect of GO exfoliation on Al corrosion in alkaline medium has been studied by weight loss, potentiodynamic polarization and FESEM methods. The potentiodynamic polarization and weight loss studies reveal that Al corrosion is strongly inhibited due to formation of an ultra thin film of exfoliated GO over Al surface and the inhibition effect highly depends on the degree of exfoliation of GO.
Keywords: Aluminium corrosion, graphene-oxide, exfoliation, polarization studies, inhibition