Experimental and Theoretical Studies on an Anionic Gemini Surfactant as Corrosion Inhibitor for AZ31 Magnesium Alloy

Abstract

Abstract: Sodium 2,2′-(13,22-dimethyl-14,21-dioxo-13,16,19,22-tetraazatetratriacontane-16,19-diyl)diacetate anionic Gemini surfactant was synthesized and utilized as a corrosion inhibitor for AZ31 alloy. The corrosion inhibition property was investigated using electrochemical methods. The surface investigation of the alloy was achieved using SEM–EDX and XPS. The strength of inhibitor to inhibit corrosion depends on the surfactant concentration, the higher inhibition efficiency was exhibited when the surfactant concentration was higher. The inhibitor appeared as a mixed-type inhibitor. The inhibiting effect of Gemini surfactant showed rapid adsorption on the alloy surface. The experimental results were related to the theoretical findings obtained from the studies based on density function theory (DFT). Graphical Abstract: [Figure not available: see fulltext.]. © 2022, The Author(s), under exclusive licence to Springer Nature Switzerland AG.