Sildenafil drug as a safe anticorrosion for 6063 aluminum alloy in acidic and alkaline solutions: Theoretical and experimental studies
The corrosion inhibition of aluminum alloy surface (6063AA) by Sildenafil (SIL) in 1 M for both HCl and NaOH solutions was investigated using weight loss, electrochemical techniques and quantum calculations. The inhibitory effect of SIL was explained by the formation of the complex adsorbed on the 6...
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Egyptian Petroleum Research Institute
2020-09-01
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| Series: | Egyptian Journal of Petroleum |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110062120302087 |
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| author | M. Abdallah Mohamed I. Awad H.M. Altass Moataz Morad Mona A. Eletre Jabir H. Al-Fahemi Wafa M. Sayed |
| author_facet | M. Abdallah Mohamed I. Awad H.M. Altass Moataz Morad Mona A. Eletre Jabir H. Al-Fahemi Wafa M. Sayed |
| author_sort | M. Abdallah |
| collection | DOAJ |
| description | The corrosion inhibition of aluminum alloy surface (6063AA) by Sildenafil (SIL) in 1 M for both HCl and NaOH solutions was investigated using weight loss, electrochemical techniques and quantum calculations. The inhibitory effect of SIL was explained by the formation of the complex adsorbed on the 6063AA surface. The adsorption obeyed Langmuir isotherm. The adsorption of the SIL is a mix of physical and chemical adsorption, where the free energy of adsorption was found to equal −39.12 and −34.6 KJ/mol, in HCl and NaOH, respectively. Experimental outcomes showed that SIL significantly inhibits the dissolution of 6063Al in both acidic and alkaline media. SIL drug acts as a mixed inhibitor in both two aggressive solutions. The correlation of the inhibition performance of SIL on 6063Al with the molecular structure was adopted using Dmol3 (Materials Studio v7. 0) based on some descriptors as EHOMO and ELUMO. Fukui indices were computed to determine the active sites of the inhibitor molecules. The equilibrium adsorption behavior of SIL on Al (111) surface was examined using molecular dynamics simulation. The quantum chemical descriptors were found suitable in explaining the inhibitive action of SIL. |
| format | Article |
| id | doaj-art-4085c90a08784479b5e5d98e021f625e |
| institution | DOAJ |
| issn | 1110-0621 |
| language | English |
| publishDate | 2020-09-01 |
| publisher | Egyptian Petroleum Research Institute |
| record_format | Article |
| series | Egyptian Journal of Petroleum |
| spelling | doaj-art-4085c90a08784479b5e5d98e021f625e2025-08-20T03:04:43ZengEgyptian Petroleum Research InstituteEgyptian Journal of Petroleum1110-06212020-09-0129321121810.1016/j.ejpe.2020.06.001Sildenafil drug as a safe anticorrosion for 6063 aluminum alloy in acidic and alkaline solutions: Theoretical and experimental studiesM. Abdallah0Mohamed I. Awad1H.M. Altass2Moataz Morad3Mona A. Eletre4Jabir H. Al-Fahemi5Wafa M. Sayed6Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia; Chemistry Department, Faculty of Applied Science, Benha University, Benha, Egypt; Corresponding authors at: Chem.Dep. Fac. of Appl. Sci., Umm Al-Qura Univ., Makkah, Saudi Arabia.Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia; Chemistry Department, Faculty of Science, Cairo University, Cairo, Egypt; Corresponding authors at: Chem.Dep. Fac. of Appl. Sci., Umm Al-Qura Univ., Makkah, Saudi Arabia.Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi ArabiaChemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi ArabiaBasic Science Dep., Faculty of Engineering, Benha University, Benha, EgyptChemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi ArabiaEgyptian Petroleum Research Institute, Nasr City Cairo, EgyptThe corrosion inhibition of aluminum alloy surface (6063AA) by Sildenafil (SIL) in 1 M for both HCl and NaOH solutions was investigated using weight loss, electrochemical techniques and quantum calculations. The inhibitory effect of SIL was explained by the formation of the complex adsorbed on the 6063AA surface. The adsorption obeyed Langmuir isotherm. The adsorption of the SIL is a mix of physical and chemical adsorption, where the free energy of adsorption was found to equal −39.12 and −34.6 KJ/mol, in HCl and NaOH, respectively. Experimental outcomes showed that SIL significantly inhibits the dissolution of 6063Al in both acidic and alkaline media. SIL drug acts as a mixed inhibitor in both two aggressive solutions. The correlation of the inhibition performance of SIL on 6063Al with the molecular structure was adopted using Dmol3 (Materials Studio v7. 0) based on some descriptors as EHOMO and ELUMO. Fukui indices were computed to determine the active sites of the inhibitor molecules. The equilibrium adsorption behavior of SIL on Al (111) surface was examined using molecular dynamics simulation. The quantum chemical descriptors were found suitable in explaining the inhibitive action of SIL.http://www.sciencedirect.com/science/article/pii/S1110062120302087AdsorptionSildenafil6063 Aluminum alloyCorrosion inhibitorsQuantum calculations |
| spellingShingle | M. Abdallah Mohamed I. Awad H.M. Altass Moataz Morad Mona A. Eletre Jabir H. Al-Fahemi Wafa M. Sayed Sildenafil drug as a safe anticorrosion for 6063 aluminum alloy in acidic and alkaline solutions: Theoretical and experimental studies Egyptian Journal of Petroleum Adsorption Sildenafil 6063 Aluminum alloy Corrosion inhibitors Quantum calculations |
| title | Sildenafil drug as a safe anticorrosion for 6063 aluminum alloy in acidic and alkaline solutions: Theoretical and experimental studies |
| title_full | Sildenafil drug as a safe anticorrosion for 6063 aluminum alloy in acidic and alkaline solutions: Theoretical and experimental studies |
| title_fullStr | Sildenafil drug as a safe anticorrosion for 6063 aluminum alloy in acidic and alkaline solutions: Theoretical and experimental studies |
| title_full_unstemmed | Sildenafil drug as a safe anticorrosion for 6063 aluminum alloy in acidic and alkaline solutions: Theoretical and experimental studies |
| title_short | Sildenafil drug as a safe anticorrosion for 6063 aluminum alloy in acidic and alkaline solutions: Theoretical and experimental studies |
| title_sort | sildenafil drug as a safe anticorrosion for 6063 aluminum alloy in acidic and alkaline solutions theoretical and experimental studies |
| topic | Adsorption Sildenafil 6063 Aluminum alloy Corrosion inhibitors Quantum calculations |
| url | http://www.sciencedirect.com/science/article/pii/S1110062120302087 |
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