Anti-Corrosion Methods and Materials · 2019 · 10 citations · 13 references
Natural SciencesChemistryMaterials ScienceCorrosion ScienceElectrochemistrySurface ScienceCorrosion ControlCorrosion EvaluationCorrosion InhibitorsCorrosion MechanismsCorrosion ResistanceCorrosion-resistant MaterialsAluminum CorrosionCorrosion InhibitionCorrosion Inhibition AssessmentCorrosion Inhibition MechanismsCorrosion Inhibitor EvaluationElectrochemical Impedance AnalysisPotentiodynamic PolarizationSelf-assembled Monolayers
Purpose This paper aims to evaluate the inhibition efficiency (IE) of oxalate ions in controlling corrosion of aluminum at pH 10. Design/methodology/approach The IE has been determined by the classical weight loss method. The corrosion behavior of aluminum was investigated by using potentiodynamic polarization and electrochemical impedance measurements. Ultra violet (UV)-visible and Fluorescence spectra have been used to analyze the film formed on the aluminum surface after immersion. Findings The maximum IE was 88 per cent, which was offered by a mixture of 250 ppm oxalate ions and 50 ppm [Zn 2+ ]. Potentiodynamic polarization data revealed that the protective film was formed on the metal surface. UV-visible and Fluorescence spectra indicated the presence of Al 3+ −oxalate complex in the protective film formed on aluminum substrate after immersion in [OX]/[Zn 2+ ] solution. Originality/value The findings of this work shed more light on the corrosion inhibition of aluminum by oxalate self-assembling monolayers.
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