Optimizing corrosion resistance: how pH shapes the inhibition mechanism of ZnAl-NO3 - LDH on mild steel
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Mohamad Nor Amirul Azhar Kamis
, Hamizah Mohd Zaki
, Zainiharyati Mohd Zain
, Mohammad Noor Jalil und Mohamad Eimaduddin Khairul Azly
Abstract
Mild steel is extensively used in various industrial applications but is susceptible to corrosion in aggressive environments. This study investigates the efficacy of layered double hydroxides (LDHs) as corrosion inhibitors for mild steel, specifically focusing on zinc-aluminium LDH intercalated with nitrate synthesized at different pH values (pH 7, pH 8, and pH 10). The variation in pH significantly influences the composition and subsequent inhibition behavior of the LDH. Characterization of the synthesized LDHs was performed using Powder X-ray Diffraction (PXRD) and Fourier Transform Infrared Spectroscopy (FTIR). Additionally, Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA), and CHNS elemental analysis were utilized to assess surface morphology and inhibitor loading. Results demonstrated that the ZnAl LDH synthesized at pH 8 exhibited a well-defined structure and the highest inhibitor loading. Corrosion inhibition studies were conducted on mild steel immersed in a neutral 3.5 wt% NaCl solution, utilizing Electrochemical Impedance Spectroscopy and Potentiodynamic Polarization. Notably, 0.1 g/L of the pH 8 ZnAl LDH achieved an impressive inhibition efficiency of 95.18 %, as indicated by the potentiodynamic polarization results. The LDH demonstrated both anodic and cathodic inhibition effects, with the corrosion inhibition mechanism attributed to the controlled release of nitrate ions, which form a passive layer on the steel surface, and the entrapment of chlorides within the LDH structure, thereby reducing the concentration of harmful chlorides in the environment.
Acknowledgments
The authors gratefully acknowledged Universiti Teknologi MARA Shah Alam, Selangor, Malaysia that provided the facilities for the project.
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Research ethics: Not applicable.
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Informed consent: Informed consent was obtained from all individuals included in this study, or their legal guardians or wards.
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Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission. MNAAK conducted the experiments and electrochemical analyses, analyzed the data including drafting figures and tables, contributed to the interpretation of results, and led the writing of the manuscript. HMZ supervised the project, coordinated the literature review and assisted in writing the introduction and discussion sections. ZMZ designed the graphical abstract, provided critical feedback on the electrochemical section to ensure the accuracy of data. MNJ commented on the electrochemical study to provide thorough discussion about the data presented. MEKA conducted the experiments and characterization of materials.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Conflict of interest: The authors state no conflict of interest.
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Research funding: None declared.
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Data availability: Not applicable.
References
1. Tichit, D.; Layrac, G.; Alvarez, M. G.; Marcu, I. C. Formation Pathways of MII/MIII Layered Double Hydroxides: A Review. Appl. Clay Sci. 2024, 248, 107234; https://doi.org/10.1016/j.clay.2023.107234.Suche in Google Scholar
2. Bukhtiyarova, M. V. A Review on Effect of Synthesis Conditions on the Formation of Layered Double Hydroxides. J. Solid State Chem. 2019, 269, 494–506; https://doi.org/10.1016/j.jssc.2018.10.018.Suche in Google Scholar
3. Misol, A.; Labajos, F. M.; Morato, A.; Rives, V. Synthesis of Zn,Al Layered Double Hydroxides in the Presence of Amines. Appl. Clay Sci. 2020, 189, 105539; https://doi.org/10.1016/j.clay.2020.105539.Suche in Google Scholar
4. Téllez-Flores, D.; Sánchez-Cantú, M.; Tzompantzi, F.; Romero-Villegas, A. G.; Tzompantzi-Flores, C.; Carrera-Crespo, J. E.; Pérez-Hernández, R.; Rubio-Rosas, E. Influence of the Zn/Al Molar Ratio over the Photocatalytic Hydrogen Production by ZnS/ZnAl-LDH Composites. Int. J. Hydrogen Energy 2024, 108, 32–42.10.1016/j.ijhydene.2024.01.069Suche in Google Scholar
5. Sertsova, A. A.; Subcheva, E. N.; Yurtov, E. V. Synthesis and Study of Structure Formation of Layered Double Hydroxides Based on Mg, Zn, Cu, and Al. Russ. J. Inorg. Chem. 2015, 60 (1), 23–32; https://doi.org/10.1134/s0036023615010167.Suche in Google Scholar
6. Haraketi, M.; Hosni, K.; Srasra, E. Intercalation Behavior of Salicylic Acid into Calcined Cu-Al-Layered Double Hydroxides for a Controlled Release Formulation. Surf. Eng. Appl. Electrochem. 2017, 53, 360–370; https://doi.org/10.3103/s106837551704007x.Suche in Google Scholar
7. Abderrazek, K.; Frini Srasra, N.; Srasra, E. Synthesis and Characterization of [Zn-Al] Layered Double Hydroxides: Effect of the Operating Parameters. J. Chin. Chem. Soc. 2017, 64 (3), 346–353; https://doi.org/10.1002/jccs.201600258.Suche in Google Scholar
8. Jiang, L.; Volovitch, P.; Wolpers, M.; Ogle, K. Activation and Inhibition of Zn–Al and Zn–Al–Mg Coatings on Steel by Nitrate in Phosphoric Acid Solution. Corros. Sci. 2012, 60, 256–264; https://doi.org/10.1016/j.corsci.2012.03.028.Suche in Google Scholar
9. Fayomi, O. S. I.; Popoola, A. P. I. Corrosion Propagation Challenges of Mild Steel in Industrial Operations and Response to Problem Definition. J. Phys.: Conf. Ser. 2019, 1378 (2), 022006.10.1088/1742-6596/1378/2/022006Suche in Google Scholar
10. Meng, X.; Li, X.; Zhang, Q.; Wu, L.; Cao, F. Temperature-dependent Structure of 3.5 wt.% NaCl Aqueous Solution: Theoretical and Raman Investigation. J. Mol. Struct. 2022, 1253, 132279; https://doi.org/10.1016/j.molstruc.2021.132279.Suche in Google Scholar
11. Liu, J.; Song, J.; Xiao, H.; Zhang, L.; Qin, Y.; Liu, D.; Hou, W.; Du, N. Synthesis and Thermal Properties of ZnAl Layered Double Hydroxide by urea Hydrolysis. Powder Technol. 2014, 253, 41–45; https://doi.org/10.1016/j.powtec.2013.11.007.Suche in Google Scholar
12. Shivaramaiah, R.; Navrotsky, A. Energetics of Order–Disorder in Layered Magnesium Aluminum Double Hydroxides with Interlayer Carbonate. Inorg. Chem. 2015, 54 (7), 3253–3259; https://doi.org/10.1021/ic502820q.Suche in Google Scholar PubMed
13. Kikuchi, C.; Kurane, H.; Watanabe, T.; Demura, M.; Kikukawa, T.; Tsukamoto, T. Preference of Proteomonas Sulcata Anion Channelrhodopsin for NO3− Revealed using a pH Electrode Method. Sci. Rep. 2021, 11, 7908; https://doi.org/10.1038/s41598-021-86812-z.Suche in Google Scholar PubMed PubMed Central
14. Mihaylov, M. Y.; Zdravkova, V. R.; Ivanova, E. Z.; Aleksandrov, H. A.; Petkov, P. S.; Vayssilov, G. N.; Hadjiivanov, K. I. Infrared Spectra of Surface Nitrates: Revision of the Current Opinions Based on the Case Study of Ceria. J. Catal. 2021, 394, 245–258; https://doi.org/10.1016/j.jcat.2020.06.015.Suche in Google Scholar
15. Sobczyk, L.; Pawlukojć, A.; Grech, E.; Huczyński, A.; Brzezinski, B. Extremely Different Structures and Vibrational Spectra of Tetramethylpyrazine Nitrate Dihydrate in Solid and Solutions. J. Mol. Struct. 2013, 1037, 264–270; https://doi.org/10.1016/j.molstruc.2013.01.003.Suche in Google Scholar
16. Shabanian, M.; Hajibeygi, M.; Raeisi, A. In Layered Double Hydroxide Polymer Nanocomposites; Woodhead Publishing: Sawston, UK, 2020; pp 77–101.10.1016/B978-0-08-101903-0.00002-7Suche in Google Scholar
17. Nguyen, T. D.; Tran, B. A.; Vu, K. O.; Nguyen, A. S.; Trinh, A. T.; Pham, G. V.; To, T. X. H.; Phan, M. V.; Phan, T. T. Corrosion Protection of Carbon Steel using Hydrotalcite/Graphene Oxide Nanohybrid. J. Coat. Technol. Res. 2019, 16, 585–595; https://doi.org/10.1007/s11998-018-0139-3.Suche in Google Scholar
18. Zuo, J.; Wu, B.; Luo, C.; Dong, B.; Xing, F. Preparation of MgAl Layered Double Hydroxides Intercalated with Nitrite Ions and Corrosion Protection of Steel bars in Simulated Carbonated Concrete Pore Solution. Corros. Sci. 2019, 152, 120–129; https://doi.org/10.1016/j.corsci.2019.03.007.Suche in Google Scholar
19. Lee, S. B.; Ko, E. H.; Park, J. Y.; Oh, J. M. Mixed Metal Oxide by Calcination of Layered Double Hydroxide: Parameters Affecting Specific Surface Area. Nanomater. 2021, 11 (5), 1153; https://doi.org/10.3390/nano11051153.Suche in Google Scholar PubMed PubMed Central
20. Diamond, L. W.; Akinfiev, N. N. Solubility of CO2 in Water from −1.5 to 100 °C and from 0.1 to 100 MPa: Evaluation of Literature data and Thermodynamic Modelling. Fluid Phase Equilib. 2003, 208 (1–2), 265–290; https://doi.org/10.1016/s0378-3812(03)00041-4.Suche in Google Scholar
21. Brunauer, S.; Emmett, P. H.; Teller, E. Adsorption of Gases in Multimolecular Layers. J. Am. Chem. Soc. 1938, 60 (2), 309–319; https://doi.org/10.1021/ja01269a023.Suche in Google Scholar
22. Lowell, S.; Shields, J. E.; Thomas, M. A.; Thommes, M. Characterization of Porous Solids and Powders: Surface Area, Pore Size and Density; Kluwer Academic Publishers: The Netherlands, Vol. 16, 2012.Suche in Google Scholar
23. Thommes, M.; Kaneko, K.; Neimark, A. V.; Olivier, J. P.; Rodriguez-Reinoso, F.; Rouquerol, J.; Sing, K. S. Physisorption of Gases, with Special Reference to the Evaluation of Surface Area and Pore Size Distribution (IUPAC Technical Report). Pure Appl. Chem. 2015, 87 (9–10), 1051–1069; https://doi.org/10.1515/pac-2014-1117.Suche in Google Scholar
24. Al-Sodani, K. A. A.; Maslehuddin, M.; Al-Amoudi, O. S. B.; Saleh, T. A.; Shameem, M. Performance of Corrosion Inhibitors in Cracked and Uncracked Silica Fume Cement Concrete Beams. Eur. J. Environ. Civ. Eng. 2020, 24 (10), 1573–1588; https://doi.org/10.1080/19648189.2018.1475306.Suche in Google Scholar
25. Tang, Z. A Review of Corrosion Inhibitors for Rust Preventative Fluids. Curr. Opin. Solid State Mater. Sci. 2019, 23 (4), 100759; https://doi.org/10.1016/j.cossms.2019.06.003.Suche in Google Scholar
26. Yap, J. Y.; Yaakob, S. M.; Rabat, N. E.; Shamsuddin, M. R.; Man, Z. Release Kinetics Study and Anti-Corrosion Behaviour of a pH-Responsive Ionic Liquid-Loaded Halloysite Nanotube-Doped Epoxy Coating. RSC Adv. 2020, 10 (22), 13174–13184.10.1039/D0RA01215GSuche in Google Scholar PubMed PubMed Central
27. Adsul, S. H.; Bagale, U. D.; Sonawane, S. H.; Subasri, R. Release Rate Kinetics of Corrosion Inhibitor Loaded Halloysite Nanotube-based Anticorrosion Coatings on Magnesium Alloy AZ91D. J. Magnesium Alloys 2021, 9 (1), 202–215; https://doi.org/10.1016/j.jma.2020.06.010.Suche in Google Scholar
28. Ayemi, G. J.; Marcelin, S.; Therias, S.; Leroux, F.; Normand, B. Synergy Effect Between Layer Double Hydroxide (LDH) and EDDS for Corrosion Inhibition of Carbon Steel. Appl. Clay Sci. 2022, 222, 106497; https://doi.org/10.1016/j.clay.2022.106497.Suche in Google Scholar
29. Li, W.; Liu, A.; Tian, H.; Wang, D. Controlled Release of Nitrate and Molybdate Intercalated in Zn-Al-Layered Double Hydroxide Nanocontainers towards Marine Anticorrosion Applications. Colloid Interface Sci. Commun. 2018, 24, 18–23; https://doi.org/10.1016/j.colcom.2018.03.003.Suche in Google Scholar
30. Emmanuel, J. K. Corrosion Protection of Mild Steel in Corrosive Media, a Shift from Synthetic to Natural Corrosion Inhibitors: A Review. Bull. Natl. Res. Cent. 2024, 48 (1), 26; https://doi.org/10.1186/s42269-024-01181-7.Suche in Google Scholar
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Artikel in diesem Heft
- Frontmatter
- In this issue
- Review
- Blockchain technology: driving change in the scientific research workflow
- Research Articles
- Sequential sorption of crystal violet and emulsified oil onto poly(lauryl methacrylate-acrylamide) hybrid hydrogel
- Catalytic synthesis of DHHB over home-made catalysts and its kinetic calculations
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Artikel in diesem Heft
- Frontmatter
- In this issue
- Review
- Blockchain technology: driving change in the scientific research workflow
- Research Articles
- Sequential sorption of crystal violet and emulsified oil onto poly(lauryl methacrylate-acrylamide) hybrid hydrogel
- Catalytic synthesis of DHHB over home-made catalysts and its kinetic calculations
- Synthesis and characterization of tricyclodecyl-containing methacrylate polymer for optoelectronics applications
- Spontaneous dehydration side reactions of core amino acids in GC-MS sample preparation: the role of drying conditions
- Optimizing corrosion resistance: how pH shapes the inhibition mechanism of ZnAl-NO3 - LDH on mild steel