Materials and Corrosion · 2012 · 30 citations · 37 references
Natural SciencesChemistryMaterials ScienceCorrosion ScienceElectrochemistryStructure-activity RelationshipsCorrosion EngineeringCorrosion InhibitorsCorrosion MechanismsCorrosion ResistanceCorrosion-resistant MaterialsElectrochemical CorrosionCopper CorrosionCorrosion InhibitionCorrosion Inhibition MechanismsCorrosion Inhibitor EffectsElectrochemical Impedance AnalysisElectrochemical Inhibition MechanismsPolarizationPotentiodynamic Polarization
Abstract This work reveals the corrosion inhibition effect of polyaspartic acid (PASP) and imidazole (IM) on copper in 3 wt% aminosulfonic acid acting as mixed‐type inhibitor of predominant cathodic effect. Potentiodynamic polarization and electrochemical impedance spectroscopy work prove that at 30 °C, 1.0 g/L PASP alone gave the best inhibitory effect of 89.8%; the inhibition efficiency could reach up to 95.4% when combining PASP and IM at the same ratio in total of 1.0 g/L. The anti‐corrosion mechanism of PASP and IM on copper is proposed from the characteristic molecular structures of these two chemicals.
37