Publications

The effect of Mn2O3 nanoparticles synthesized at different pH by co-precipitation method on the electrochemical corrosion behaviour of carbon steel in 0.5 M hydrochloric acid was inspected by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The corrosion behaviour of carbon steel in 0.5 M HCl, 0.5 M H3PO4 and 0.5 M H2SO4 was also examined in presence of 20 ppm Mn2O3 nanoparticles. Mn₂O₃ nanoparticles prepared at pH 10 to 13 were characterized by X-ray diffraction, XRD, transmission electron microscopy, TEM, and Fourier transform infrared analyses, FTIR. Electrochemical impedance spectroscopy measurements showed that the dissolution process takes place under activation control. Potentiodynamic polarization curves showed that Mn2O3 nanoparticles slightly enhance the corrosion resistance of carbon steel in acidic solutions. The efficiency was found to increase with decreasing pH at which Mn2O3 nanoparticles were synthesized. Mn2O3 nanoparticles synthesized at pH 10 has a better effect in 0.5 M HCl than in 0.5 M H2SO4 or 0.5 M H3PO4.