Materials and Corrosion · 2010 · 70 citations · 34 references
Natural SciencesMaterials EngineeringMaterials ScienceCorrosion ScienceElectrochemistrySurface ScienceCorrosion EngineeringCorrosion InhibitorsCorrosion MechanismsCorrosion Of SteelsCorrosion-resistant MaterialsElectrochemical CorrosionAdsorption PhenomenaCarbon Steel CorrosionCorrosion InhibitionCorrosion Inhibition MechanismsCorrosion Inhibitor EffectsCorrosion Inhibitors For Carbon SteelEnvironmentally Friendly InhibitorsPotentiodynamic Polarization
Abstract The inhibitor effect of the environmentally friendly corrosion inhibitor polyaspartic acid (PASP) on the corrosion of carbon steel in 0.5 M H 2 SO 4 was investigated by weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). Polarization curve results clearly reveal the fact that PASP is a good anode‐type inhibitor. EIS results confirm its corrosion inhibition ability. The inhibition efficiency increases with increasing PASP concentration, and the maximum inhibition efficiency was 80.33% at 10 °C. SEM reveals that a protective film forms on the surface of the inhibited sample. The adsorption of this inhibitor is found to follow the Freundlich adsorption isotherm. A mechanism is proposed to explain the inhibitory action of the corrosion inhibitor.
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