Eelectrochemical Study of Inhibition Effect of a Schiff Base towards Magnesium Alloy Corrosion

摘要

The inhibition effect of a Schiff base Nbis (2-pyridylmethylidene)-1,2-diiminoethane (BPMDE) onAZ31 magnesium alloy was studied in this work. Results showed the BPMDE acts as an effectiveinhibitor for magnesium in 0.01 M HCl. Potentiodynamic polarization characterization revealed theBPMDE inhibits both anodic and cathodic reactions, indicating the BPMDE acts as a mixed-typecorrosion inhibitor behavior. Due to the increasing of adsorption of BPMDE on magnesium alloysurface, the charge transfer resistance consequently increased while the double layer capacitancedeclined. Moreover, the adsorption of BPMDE on the AZ31 magnesium alloy surface obeys theLangmuir isotherm.