Journal
CORROSION SCIENCE
Volume 203, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2022.110344
Keywords
Magnesium; Corrosion inhibitor; Plasma electrolytic oxidation; 8-hydroxyquinoline
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This study explores the corrosion inhibition effect of 8-hydroxyquinoline (8HQ) on a PEO-coated AZ21 magnesium alloy. The corrosion inhibition mechanism is attributed to the extensive precipitation of insoluble complex between 8HQ molecules and Mg(2+) on top of the PEO layer.
In this study, the corrosion inhibition effect of 8-hydroxyquinoline (8HQ) on a PEO-coated AZ21 magnesium alloy is explored. The interaction of 8HQ molecules with both bare AZ21 and PEO layer was thoroughly scrutinized during the exposure to a corrosive NaCl electrolyte using different characterization methods, including EIS, SEM, Raman spectroscopy, and XRD. The corrosion inhibition mechanism stems from the extensive precipitation of the insoluble complex between 8HQ molecules and Mg(2+ )on top of the PEO layer, which leads to subsequently inhibition-enhancing phenomena, including modification of the corrosion products and re precipitation of the PEO amorphous phase.
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