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Abstract

The effect of the acriflavine inhibitor and silicon dioxide nanoparticles on the corrosion of carbon steel in 0.25 M hydrochloric acid have been studied using the open circuit potential (OCP), potentiodynamic polarization (PDP), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and atomic force microscopy (AFM) techniques. It was observed that the corrosion inhibition effect on the steel electrode is enhanced in the presence of silica nanoparticles which form a protective layer on the electrode surface. The results showed that acriflavine inhibitor is a good inhibitor, which acts as a mixed-type inhibitor control for carbon steel, and the inhibition increases in the presence of silica nanoparticles. The images from SEM and EDS analyses indicate the formation of films on the surface electrode, while the AFM measurements confirmed that the average roughness value reduces which refers to the protection layer. The kinetic parameters for the corrosion process have been calculated and are discussed.