Impervious nature of Al2O3-Pani composite against corrosion on mild steel in strong acidic environment

Abstract

Solubility problem of composite in aqueous medium is resolved on adding Al2O3 during the oxidative polymerization of aniline using ammonium peroxydisulphate as an oxidant and sodium salt of dodecyl bezenesulphonic acid as surfactant and dopant at 273 K temperature. The yielded water soluble Al2O3-PANI composite is confirmed by comparing the FTIR, XRD and SEM recorded spectra with previously reported one. Gravimetric method exposes that the prepared composite is having confrontation against corrosion. Only a slight change in efficiency on continuous exposure up to eight hours is observed. OCP data are transformed in to potential graph to exposes the invincibility of the composite against corrosion. Measurement of potentiodynamic polarization and EIS studies also confirms the defiance against corrosion.