Electrochemical Study of Corrosion Inhibition Properties of Polyvinyl Alcohol/Graphene Nanocomposites on Carbon Steel

In this work, anti-corrosion behavior of synthesized water soluble poly vinyl alcohol/graphene (PVA/G) nanocomposite was investigated. Firstly, prepared PVA/G was characterized by FTIR,SEM-EDX, and XRD techniques. Then, electrochemical techniques such as open circuit potential (OCP), potentiodynamic polarization and electrochemical impedance (EIS) were employed to study the corrosion protection performance of PVA/G on carbon steel in NaCl 3.5%environment. The role of concentration of PVA/G, incubation time of film formation on the carbon steel corrosion has been investigated. Observed results showed the PVA/G acts as mixedtype inhibitor and could serve as an effective corrosion inhibitor for carbon steel in NaCl 3.5%environment. Surface morphology of the protected carbon steel specimen with PVA/G was investigated by SEM and EDXA that confirms the protection of mild steel surface by strong adsorption of nanocomposite. Observed results will be presented and discussed.

Keywords:

Corrosion , Polyvinyl alcohol , Graphene , EIS , Tafel