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https://hdl.handle.net/123456789/1505| Τύπος: | Άρθρο σε επιστημονικό περιοδικό |
| Τίτλος: | Evaluation of Crocin as green corrosion inhibitor for aluminum in NaCl solution |
| Συγγραφέας: | [EL] Πανταζοπούλου, Παρασκευή[EN] Pantazopoulou, Paraskevi [EL] Καλογεροπούλου, Σοφία[EN] Kalogeropoulou, Sofia [EL] Θεοχάρη, Σταματίνα[EN] Theohari, Stamatina [EL] Παπαμιχάλης, Ελευθέριος[EN] Papamichalis, Eleftherios [EL] Τζέλη, Δήμητρα[EN] Tzeli, Demeter |
| Ημερομηνία: | 15/11/2022 |
| Περίληψη: | The role of Crocin, which is a natural organic substance from the Greek plant Crocus sativus, is investigated as a green corrosion inhibitor for the AA 1050 commercial aluminum alloy in 0.01 M sodium chloride solution. Its action was assessed by Linear and Tafel Polarization, as well as by mass loss measurements and confirmed by observation and analysis of the surface morphology of the specimens by Scanning Electron Microscopy. Corrosion inhibition efficiency of Crocin improves with concentration and at 1.25 mM was estimated in the range of 90-95%, which indicates the formation of an adsorbed layer that isolates and protects the surface. Experimental results showed that Crocin acts as a mixed-type inhibitor with predominantly anodic effectiveness, also retarding pitting corrosion process. The inhibitive action of Crocin was explained by theoretical calculations employing density functional theory, semiempirical PM6 and molecular mechanics methodologies, showing good agreement with experimental results. The reactivity of Crocin is attributed to chemisorption on the Al2O3 surface through its vicinal hydroxyls of the sugar moiety. This process is assisted by the π-conjugated system of the polyene chain together with the extended electron delocalization over the oxygen atoms of the esterified carboxyl groups, as well as by the intense electrostatic potential regions located on the sugar moiety of the Crocin molecule. |
| Γλώσσα: | Αγγλικά |
| Σελίδες: | 17 |
| DOI: | 10.1080/00986445.2022.2147834 |
| EISSN: | 1563-5201 |
| Θεματική κατηγορία: | [EL] Μέταλλα και Κράματα[EN] Metals and Alloys [EL] Επιστήμη υλικών, διεπιστημονική προσέγγιση[EN] Materials science, interdisciplinary |
| Λέξεις-κλειδιά: | Aluminum corrosion inhibitors; Crocin; density functional theory; electrochemical techniques; PM6; theoretical calculations |
| Κάτοχος πνευματικών δικαιωμάτων: | © 2022 Taylor & Francis Group |
| Ηλεκτρονική διεύθυνση του τεκμηρίου στον εκδότη: | https://www.tandfonline.com/doi/full/10.1080/00986445.2022.2147834 |
| Ηλεκτρονική διεύθυνση περιοδικού: | https://www.tandfonline.com/journals/gcec20 |
| Τίτλος πηγής δημοσίευσης: | Chemical Engineering Communications |
| Τεύχος: | 10 |
| Τόμος: | 210 |
| Σελίδες τεκμηρίου (στην πηγή): | 1756-1772 |
| Σημειώσεις: | This research is co-financed by Greece and the European Union (European Social Fund- ESF) through the Operational Programme «Human Resources Development, Education and Lifelong Learning» in the context of the project “Reinforcement of Postdoctoral Researchers - 2nd Cycle” (MIS-5033021), implemented by the State Scholarships Foundation (ΙΚΥ). |
| Εμφανίζεται στις συλλογές: | Μεταδιδακτορικοί ερευνητές |
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