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Sulaimon AA, Murungi PI, Tackie-Otoo BN, Nwankwo PC, Bustam MA. Analysis of natural okra extracts as corrosion inhibitors for mild steel in acidic medium. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:119309-119328. [PMID: 37924403 DOI: 10.1007/s11356-023-30635-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 10/19/2023] [Indexed: 11/06/2023]
Abstract
Plant extracts have been shown to effectively inhibit metal corrosion. Using the Box-Behnken design, gravimetric, and electrochemical techniques, analyses were designed to investigate the anti-corrosion potential of okra in a 1M HCl medium. The inhibition performances derived from the various methods were in good agreement, demonstrating that physio-chemisorption was effective and adhered to the Langmuir isotherm model. The efficiency of okra mucilage extract was 96% at a much lower concentration compared to 91.2% and 88.4% for the unsieved extract and gelly-okra filtrate, respectively. FTIR results showed the presence of several functional groups in the okra mucilage extract that are associated with adsorption, and TGA analysis revealed that the extract has high thermal stability. FESEM analysis also supported evidence of adsorption. It was determined that corrosion inhibition by okra mucilage extract was primarily influenced by temperature, followed by extract concentration, with immersion time having the least effect. From the model optimization, it was observed that okra mucilage extract at 200 ppm, 60°C, and 24 h gave an inhibition efficiency of 89.98% and high desirability. These results demonstrate the high capacity of natural okra as an efficient biodegradable corrosion inhibitor.
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Affiliation(s)
- Aliyu Adebayo Sulaimon
- Department of Petroleum Engineering, Universiti Teknologi PETRONAS, Seri Iskandar, Malaysia
- Centre of Research in Ionic Liquids (CORIL), Universiti Teknologi PETRONAS, Seri Iskandar, Malaysia
| | - Pearl Isabellah Murungi
- Department of Petroleum Engineering, Universiti Teknologi PETRONAS, Seri Iskandar, Malaysia.
- Centre of Research in Ionic Liquids (CORIL), Universiti Teknologi PETRONAS, Seri Iskandar, Malaysia.
| | - Bennet Nii Tackie-Otoo
- Department of Petroleum Engineering, Universiti Teknologi PETRONAS, Seri Iskandar, Malaysia
| | | | - Mohamad Azmi Bustam
- Centre of Research in Ionic Liquids (CORIL), Universiti Teknologi PETRONAS, Seri Iskandar, Malaysia
- Department of Chemical Engineering, Universiti Teknologi PETRONAS, Seri Iskandar, Malaysia
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2
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Shkoor M, Jalab R, Khaled M, Shawkat TS, Korashy HM, Saad M, Su HL, Bani-Yaseen AD. Experimental and theoretical investigations of the effect of bis-phenylurea-based aliphatic amine derivative as an efficient green corrosion inhibitor for carbon steel in HCl solution. Heliyon 2023; 9:e20254. [PMID: 37780763 PMCID: PMC10539979 DOI: 10.1016/j.heliyon.2023.e20254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 08/26/2023] [Accepted: 09/16/2023] [Indexed: 10/03/2023] Open
Abstract
A novel bis-phenylurea-based aliphatic amine (BPUA) was prepared via a facile synthetic route, and evaluated as a potential green organic corrosion inhibitor for carbon steel in 1.0 M HCl solutions. NMR spectroscopy experiments confirmed the preparation of the targeted structure. The corrosion inhibitory behavior of the prospective green compound was explored experimentally by electrochemical methods and theoretically by DFT-based quantum chemical calculations. Obtained results revealed an outstanding performance of BPUA, with efficiency of 95.1% at the inhibitor concentration of 50 mg L-1 at 25 °C. The novel compound has improved the steel resistivity and noticeably reduced the corrosion rate from 33 to 1.7 mils per year. Furthermore, the adsorption study elucidates that the mechanism of the corrosion inhibition activity obeys Langmuir isotherm with mixed physisorption/chemisorption modes for BPUA derivatives on the steel surface. Calculated Gibb's free energy of the adsorption process ranges from -35 to -37 kJ mol-1. The SEM morphology analysis validates the electrochemical measurements and substantiates the corrosion-inhibiting properties of BPUA. Additionally, the eco-toxicity assessment on human epithelial MCF-10A cells proved the environmental friendliness of the BPUA derivatives. Density functional theory (DFT) calculations correlated the inhibitor's chemical structure with the corresponding inhibitory behavior. Quantum descriptors disclosed the potentiality of BPUA adsorption onto the surface through the heteroatom-based functional groups and aromatic rings.
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Affiliation(s)
- Mohanad Shkoor
- Department of Chemistry & Earth Sciences, College of Arts & Science, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Rem Jalab
- Gas Processing Center, College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Mazen Khaled
- Department of Chemistry & Earth Sciences, College of Arts & Science, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Tahseen S. Shawkat
- Department of Pharmaceutical Sciences, College of Pharmacy, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Hesham M. Korashy
- Department of Pharmaceutical Sciences, College of Pharmacy, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Mohamed Saad
- Gas Processing Center, College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
- Department of Chemical Engineering, College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Haw-Lih Su
- Department of Applied Chemistry, National Chiayi University, 300 Syuefu Rd, Chiayi City, Taiwan
| | - Abdulilah Dawoud Bani-Yaseen
- Department of Chemistry & Earth Sciences, College of Arts & Science, Qatar University, P.O. Box 2713, Doha, Qatar
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Fawzy A, Toghan A, Alqarni N, Morad M, Zaki MEA, Sanad MMS, Alakhras AI, Farag AA. Experimental and Computational Exploration of Chitin, Pectin, and Amylopectin Polymers as Efficient Eco-Friendly Corrosion Inhibitors for Mild Steel in an Acidic Environment: Kinetic, Thermodynamic, and Mechanistic Aspects. Polymers (Basel) 2023; 15:891. [PMID: 36850177 PMCID: PMC9963790 DOI: 10.3390/polym15040891] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 01/26/2023] [Accepted: 01/30/2023] [Indexed: 02/15/2023] Open
Abstract
Herein, the inhibition impacts of chitin, pectin, and amylopectin as carbohydrate polymers on the corrosion of mild steel in 0.5 M HCl were researched utilizing various experimental and theoretical tools. The acquired outcomes showed that the inhibition efficiencies (% IEs) of the tested carbohydrate polymers were increased by raising their concentrations and these biopolymers acting as mixed-kind inhibitors with major anodic ones. The acquired % IEs values were reduced with rising temperature. The higher % IEs of the tested polymers were inferred via powerful adsorption of the polymeric molecules on the steel surface and such adsorption obeyed the Langmuir isotherm. The computed thermodynamic and kinetic quantities confirmed the mechanism of physical adsorption. The kinetics and mechanisms of corrosion and its protection by polymeric compounds were illuminated. The results obtained from all the techniques used confirmed that there was good agreement with each other, and that the % of IEs followed the sequence: chitin > amylopectin > pectin.
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Affiliation(s)
- Ahmed Fawzy
- Chemistry Department, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia
- Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
| | - Arafat Toghan
- Chemistry Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
- Chemistry Department, Faculty of Science, South Valley University, Qena 83523, Egypt
| | - Nada Alqarni
- Department of Chemistry, College of Science and Arts in Balgarn, University of Bisha, Bisha 61922, Saudi Arabia
| | - Moataz Morad
- Chemistry Department, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia
| | - Magdi E. A. Zaki
- Chemistry Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
| | - Moustafa M. S. Sanad
- Central Metallurgical Research & Development Institute, P.O. Box 87, Helwan, Cairo 11421, Egypt
| | - Abbas I. Alakhras
- Chemistry Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
| | - Ahmed A. Farag
- Egyptian Petroleum Research Institute (EPRI), Cairo 11727, Egypt
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Sulaimon AA, Murungi PI, Tackie-Otoo BN, Nwankwo PC, Bustam MA. Quantitative and qualitative analyses of grafted okra for corrosion inhibition of mild steel in acidic medium. Front Chem 2023; 11:1129673. [PMID: 36909707 PMCID: PMC9998522 DOI: 10.3389/fchem.2023.1129673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 02/09/2023] [Indexed: 03/14/2023] Open
Abstract
Introduction: Natural plant polymers demonstrate effective corrosion inhibition abilities, because of their numerous binding sites and excellent adsorption abilities. Methodology: In this study, the Box-Behnken method, gravimetric and electrochemical analyses were used to design and investigate the corrosion inhibition potential of a modified graft polymer of okra for mild steel in a 1M HCl medium. The influence of inhibitor concentration, temperature, and time were also investigated. Qualitatively, the Fourier Transform Infrared (FTIR) spectroscopy, Thermogravimetric Analysis (TGA), and Field emission scanning electron microscopy (FESEM) were used to characterize the extracts and evaluate the metal's surface morphology. Results and discussion: The quantitative analyses showed that the modified natural polymer's inhibition efficiency (IE) increased with concentration and reached 73.5% at 800 ppm, with a mixed-type mode of inhibition. From the response surface methodology, it was revealed that temperature influences the IE more than concentration and immersion time. The optimized IE using the desirability function showed the possibility of attaining 88.2% inhibition with inhibitor concentration at 142.3 ppm, temperature at 60.4°C, and an immersion time of 22.4 h. The new functional groups in the hybrid polymer revealed by FTIR analysis shows that grafting improved the inhibitor's adsorption abilities. TGA analysis confirmed the extract's high thermal stability, which highlights the inhibitor's strong adsorption and efficiency for high temperatures. FESEM analysis indicated evidence of inhibitor adsorption onto the metal surface. Conclusion: These findings suggest that the grafting of okra with acrylamide enhances its inhibition properties and contributes to its functionality as a cost-effective plant-based alternative inhibitor against corrosion for mild steel facilities.
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Affiliation(s)
- Aliyu Adebayo Sulaimon
- Department of Petroleum Engineering, Universiti Teknologi Petronas, Tronoh, Malaysia.,Centre of Research in Ionic Liquids (CORIL), Universiti Teknologi Petronas, Seri Iskandar, Malaysia
| | - Pearl Isabellah Murungi
- Department of Petroleum Engineering, Universiti Teknologi Petronas, Tronoh, Malaysia.,Centre of Research in Ionic Liquids (CORIL), Universiti Teknologi Petronas, Seri Iskandar, Malaysia
| | | | | | - Mohamad Azmi Bustam
- Department of Chemical Engineering, Universiti Teknologi Petronas, Tronoh, Malaysia.,Centre of Research in Ionic Liquids (CORIL), Universiti Teknologi Petronas, Seri Iskandar, Malaysia
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5
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Rezaeivala M, Bozorg M, Rafiee N, Sayin K, Tuzun B. A new morpholine-based ligand as corrosion inhibitor for Carbon Steel during acid pickling: Experimental and theoretical studies. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.110323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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6
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MD and DFT computational simulations of Caffeoylquinic derivatives as a bio-corrosion inhibitor from quince extract with experimental investigation of corrosion protection on mild steel in 1M H2SO4. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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7
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Murthy R, Vedarajan R, Sundaresan CN. Quantum Chemical and Electrochemical Evaluation of Isoperthiocyanic Acid Derivatives as Novel Corrosion Inhibitors of Mild Steel in 2 M Hydrochloric Acid. SURFACE ENGINEERING AND APPLIED ELECTROCHEMISTRY 2022. [DOI: 10.3103/s106837552301012x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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8
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Hau NN, Huong DQ. Effect of aromatic rings on mild steel corrosion inhibition ability of nitrogen heteroatom-containing compounds: Experimental and theoretical investigation. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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9
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UĞUZ Ö, GÜMÜŞ M, SERT Y, KOCA İ, KOCA A. Utilization of pyrazole-perimidine hybrids bearing different substituents as corrosion inhibitors for 304 stainless steel in acidic media. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133025] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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10
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Natash Mary R, Nazareth R, Suchetan PA, Potla K. Schiff Bases Derived from Triazoles as Corrosion Inhibitors for Maraging Steel in Acid Mixtures: Experimental and Theoretical Studies. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2055582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
| | - Ronald Nazareth
- Department of Chemistry, St Aloysius College, Mangaluru, India
| | - Parameshwar Adimule Suchetan
- Department of Studies and Research in Chemistry, University College of Science, Tumkur University, Tumakuru, India
| | - Krishnamurthy Potla
- Department of Chemistry, Bapatla Engineering College (Autonomous), Acharaya Nagarjuna University Post Graduate Research Centre, Bapatla, India
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Aslam R, Serdaroglu G, Zehra S, Kumar Verma D, Aslam J, Guo L, Verma C, Ebenso EE, Quraishi M. Corrosion inhibition of steel using different families of organic compounds: Past and present progress. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118373] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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12
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Geng S, Hu J, Yu J, Zhang C, Wang H, Zhong X. Rosin imidazoline as an eco-friendly corrosion inhibitor for the carbon steel in CO2-containing solution and its synergistic effect with thiourea. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Experimental and Quantum Chemical Studies of Synergistic Enhancement of the Corrosion Inhibition Efficiency of Ethanol Extract of Carica papaya peel for Aluminum in Solution of HCl. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100290] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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14
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Assad H, Kumar A. Understanding functional group effect on corrosion inhibition efficiency of selected organic compounds. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117755] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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15
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Israa M. Al-Jubanawi, Al-Sawaad HZ, Alwaaly AA. Synthesis Characterization and Corrosion Inhibition of Thiourea and Phthalic Anhydride Complex with Ni(II) for Carbon Steel Alloy C1010 0.1 M Hydrochloric Acid. SURFACE ENGINEERING AND APPLIED ELECTROCHEMISTRY 2021. [DOI: 10.3103/s1068375521050057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Upadhyay A, Purohit AK, Mahakur G, Dash S, Kar PK. Verification of corrosion inhibition of Mild steel by some 4-Aminoantipyrine-based Schiff bases – Impact of adsorbate substituent and cross-conjugation. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115960] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Ait Addi B, El Ibrahimi B, Ait Addi A, Shaban A, Ait Addi E, Hamdani M. Assessment of Corrosion Inhibition Performance and Adsorption Thermodynamics of Hydrogen Phosphate (HPO
4
2−
) and Molybdate (MoO
4
2−
) Oxyanions on Tin in Maleic Acid. ELECTROANAL 2021. [DOI: 10.1002/elan.202060581] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Brahim Ait Addi
- Team of Physical Chemistry and Environment, Faculty of Science Ibn Zohr University Agadir 80000 Morocco
| | - Brahim El Ibrahimi
- Team of Physical Chemistry and Environment, Faculty of Science Ibn Zohr University Agadir 80000 Morocco
| | - Abdelaziz Ait Addi
- Team of Physical Chemistry and Environment, Faculty of Science Ibn Zohr University Agadir 80000 Morocco
| | - Abdul Shaban
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences Hungarian Academy of Sciences Budapest H-1117 Hungary
| | - El‐Habib Ait Addi
- Biotechnology, Energy and Environment Group, High School of Technology Ibn Zohr University Agadir 80150 Morocco
| | - Mohamed Hamdani
- Team of Physical Chemistry and Environment, Faculty of Science Ibn Zohr University Agadir 80000 Morocco
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El Nagy HA, H. El Tamany E, Ashour H, El-Azabawy OE, Zaki EG, Elsaeed SM. Polymeric Ionic Liquids Based on Benzimidazole Derivatives as Corrosion Inhibitors for X-65 Carbon Steel Deterioration in Acidic Aqueous Medium: Hydrogen Evolution and Adsorption Studies. ACS OMEGA 2020; 5:30577-30586. [PMID: 33283106 PMCID: PMC7711703 DOI: 10.1021/acsomega.0c04505] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 11/04/2020] [Indexed: 06/12/2023]
Abstract
Ionic liquids have significantly enhanced ecofriendly benefits compared to the traditional inhibitors. In the present work, new four polymeric ionic liquids based on benzoimidazole derivatives were synthesized through the reaction of 2-styryl-1H-benzo[d]imidazole with alkyl halide to form PIL1. Then, Cl- anions were exchanged with different anions through the neutralization reaction to form other investigated polymers. Their structures were chemically elucidated using Fourier transform infrared spectroscopy, 1H NMR, and 13C NMR. Their influence on carbon steel (CS) as corrosion inhibitors has been checked with dielectric spectroscopy in addition to potentiodynamic polarization curves. It was found that the percentage of inhibition efficiency increases as inhibitor's concentrations increase, suggesting a decrease in the rate of CS corrosion. Additionally, the hydrogen evolution rate controlled by the four polymers was monitored. Addition of the prepared polymers lessened the rate of generation of hydrogen as the inhibitor's concentrations augmented. Scanning electric electron microscopy in addition to energy-dispersive X-ray diffraction has proved the morphology of the CS surface as well as the formed protective film.
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Affiliation(s)
- Hala A. El Nagy
- Chemistry Department,
Faculty of Science, Suez Canal
University, Ismailia 41522, Egypt
| | - ElSayed H. El Tamany
- Chemistry Department,
Faculty of Science, Suez Canal
University, Ismailia 41522, Egypt
| | - Hana Ashour
- Chemistry Department,
Faculty of Science, Suez Canal
University, Ismailia 41522, Egypt
| | | | - Elsayed G. Zaki
- Egyptian
Petroleum Research Institute (EPRI), Nasr City, Cairo 11727, Egypt
| | - Shimaa M. Elsaeed
- Egyptian
Petroleum Research Institute (EPRI), Nasr City, Cairo 11727, Egypt
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19
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Hassan N, Ramadan AM, Khalil S, Ghany NAA, Asiri AM, El-Shishtawy RM. Experimental and computational investigations of a novel quinoline derivative as a corrosion inhibitor for mild steel in salty water. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125454] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Theoretical and electrochemical evaluation of 2-thioureidobenzheteroazoles as potent corrosion inhibitors for mild steel in 2 M HCl solution. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114081] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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21
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Paul PK, Yadav M. Investigation on corrosion inhibition and adsorption mechanism of triazine-thiourea derivatives at mild steel / HCl solution interface: Electrochemical, XPS, DFT and Monte Carlo simulation approach. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114599] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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22
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Huong DQ, Lan Huong NT, Anh Nguyet TT, Duong T, Tuan D, Thong NM, Nam PC. Pivotal Role of Heteroatoms in Improving the Corrosion Inhibition Ability of Thiourea Derivatives. ACS OMEGA 2020; 5:27655-27666. [PMID: 33134729 PMCID: PMC7594336 DOI: 10.1021/acsomega.0c04241] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 10/05/2020] [Indexed: 06/11/2023]
Abstract
1,3-Diphenyl-2-thiourea (DPTU) and 1-phenyl-3-(2-pyridyl)-2-thiourea (PPTU) were selected as the researched subject for investigating the effect of heteroatoms on the low carbon steel corrosion inhibition ability. Results from the potentiodynamic polarization measurements (PPM) indicate that the addition of a nitrogen atom in the benzene ring increases the corrosion inhibition efficiency of PPTU (97.2%), being higher than that of DPTU (93.1%) at the same condition of 2.0 × 10-4 M at 30 °C. The Nyquist diagrams show that increasing the concentrations of both DPTU and PPTU will enhance the charge-transfer resistance and reduce the double-layer capacitance. The obtained data based on PPM and electrochemical impedance spectroscopy methods are in accordance to the analysis based on the scanning electrochemical microscopy images. Besides, results from quantum chemical calculations prove that the heteroatoms in the inhibitor molecules are the adsorption centers, and the benzene rings increase the electrostatic interaction between the inhibitor molecules and the steel surface. Results from Monte Carlo and molecular dynamics simulation have clarified the adsorption mechanism of DPTU and PPTU on the steel surface. Adsorption energies confirm that PPTU displays the higher inhibition ability as compared with DPTU.
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Affiliation(s)
- Dinh Quy Huong
- Department
of Chemistry, University of Education, Hue
University, Hue City 530000, Viet Nam
| | - Nguyen Thi Lan Huong
- Department
of Chemistry, University of Education, Hue
University, Hue City 530000, Viet Nam
| | - Tran Thi Anh Nguyet
- Department
of Chemistry, University of Education, Hue
University, Hue City 530000, Viet Nam
| | - Tran Duong
- Department
of Chemistry, University of Education, Hue
University, Hue City 530000, Viet Nam
| | - Dinh Tuan
- Department
of Chemistry, University of Sciences, Hue
University, Hue City 530000, Viet Nam
| | - Nguyen Minh Thong
- The
University of Danang, Campus in Kon Tum, Kontum City 580000, Viet Nam
| | - Pham Cam Nam
- Department
of Chemistry, The University of Danang—University
of Science and Technology, Danang
City 550000, Vietnam
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