Insight into Anti-Corrosion Behavior and Mechanism of 8-Hydroxyquinoline Inhibitor on AZ91D Alloy in Different Concentrations of Sodium Chloride Solution
Source abstract
Abstract
The inhibition behavior of the promising eco-friendly inhibitor 8-hydroxyquinoline (8HQ) in two concentrations of sodium chloride solution was studied by hydrogen evolution, scanning electron microscope (SEM), three-dimensional morphology, electrochemical testing, and computational calculations. The results indicated that the 8HQ inhibitor showed satisfactory inhibition effect due to its fast, excellent adsorption capacity and self-healing ability. The corrosion inhibition effect is related to the concentration of the inhibitor. There was a competitive adsorption relationship between 8HQ and [Cl−], and the adsorption morphology was obviously affected by the concentration of [Cl−]. At the lower concentration of NaCl solution, the adsorption of 8HQ was more orderly, faster, and the adsorption amount was larger, which led to the formation of a denser protective layer. Density functional theory (DFT) results showed that the most stable adsorption configuration of 8HQ was NO-Top. N and O atoms are the active sites, and there is a strong coupling between them and Mg atoms, which is consistent with the experimental results.
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Research context
OpenAlex topics: Corrosion Behavior and Inhibition · Magnesium Oxide Properties and Applications · Magnesium Alloys: Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials and Chemical Engineering, Xi’an Technological University, Xi’an 710021, China
College of Chemical Engineering and Modern Materials, Shangluo University, Shangluo 726000, China
Material Corrosion and Protection Key Laboratory of Sichuan Province, Sichuan University of Science & Engineering, Zigong 643000, China
Funding
National Natural Science Foundation of China · Youth Innovation Team of Shaanxi Universities: Metal corrosion protection and surface engineering technology · Key Projects of Shaanxi Natural Science Foundation Research Program · Opening Project of Material Corrosion and Protection Key Laboratory of Sichuan province · Scientific Research Fund of Shangluo University
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