What is it about?
Material corrosion is one of the outstanding challenging problems in the industry, and it strongly influences refining and petrochemical plants lifetime. Therefore, prevention of the corrosion of different metals and alloys is imperative in the viewpoint of industrial safety and productivity. For this purpose, the application of suitable corrosion inhibitors is one of the most applicable solutions. The present paper focuses on the anticorrosive properties of three biologically active chalcones, namely (E)-2-(4-(3-(2,5 dimethoxy phenyl)acryloyl) phenoxy)acetic acid (AA-3), 2-(4-(3-(4-methoxyphenyl)propanoyl)phenoxy)acetic acid (AA-2) and (E)-2-(4-(3-(p-tolyl)acryloyl)phenoxy) acetic acid (AA-1) for mild steel in hydrochloric acid at temperature range 303−333 K. The corrosion inhibition performances of chalcones were evaluated by electrochemical tests, gravimetrical method, SEM, molecular orbital theory and molecular dynamics (MD) simulations. Results show that at the concentration of 5 × 10−3 molL-1, chalcone derivatives show high corrosion inhibition activities. All compounds are found to act via adsorption at the metal/solution interface, and their adsorption follows Langmuir isotherm model. Electrochemical tests indicate that the three chalcones act as mixed-type inhibitors. The thermodynamic data of adsorption were determined and discussed. Density Functional Theory (DFT) and MD simulations were used to assess the active sites of adsorption of the three inhibitors and their interaction with the iron surface, respectively. Scanning electron microscope (SEM) was used to analyze the surface morphological changes that chalcones induce in the corroded mild steel. The comparison of experimental results with theoretical data indicates that methoxy functional groups have a considerable influence on the anticorrosive properties of tested chalcones.
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Why is it important?
Chalcones are very nice compounds. They possess any property that you look for. From antimicrobial, anticancer to as corrosion inhibitor. Synthesis of these compounds are relatively easier and scalable at lower cost.
Perspectives
Corrosion of mild steel takes place in many environments especially during oil filed acidification process. One way to address this problem is by use of organic corrosion inhibitors. Our related publications: (i) H. Lgaz, K. S. Bhat, R. Salghi, Shubhalaxmi, S. Jodeh, M. Algarra, B. Hammouti, A. Essamri, Insights into corrosion inhibition behavior of three chalcone derivatives for mild steel in hydrochloric acid solution, J. Mol. Liq, Vol 238, 71-83, 2017. (ii) H. Lgaz, R. Salghi, K. S. Bhat, A. Chaouiki, Shubhalaxmi, S. Jodeh, Correlated Experimental and Theoretical Study on Inhibition Behavior of Novel Quinoline Derivatives for the Corrosion of Mild Steel in Hydrochloric Acid Solution, J. Mol. Liq., 244, 154-168, 2017. (iii) H. Lgaz, R. Salghi, A. Chaouiki, Shubhalaxmi, S. Jodeh, K. S. Bhat, Pyrazoline derivatives as possible Corrosion Inhibitors for Mild Steel in Acidic Media: A combined Experimental and Theoretical approach, Cogent Engg, 2018, Article id: 1441585 (17 pages). (iv) A. Chaouiki, H. Lgaz, Ill-Min Chung, I. H. Ali, S. L. Gaonkar, K. S. Bhat, R. Salghi, H. Oudda and M. I. Khan, Understanding Corrosion Inhibition of Mild Steel in Acid Medium by new benzonitriles: Insights from Experimental and Computational Studies, J Mol. Liq., 266, 603-616, 2018. (v) A. Chaouiki, H. Lgaz, S. Zehra, Rachid Salghi, Ill-Min Chung, Y. E. Aoufir, K. S. Bhat, I. H. Ali, S. L. Gaonkar, M. I. Khan, H. Oudda, Exploring Deep Insights into the Interaction Mechanism of a Quinazoline Derivative with Mild Steel in HCl: Electrochemical, DFT, and Molecular Dynamic Simulation Studies, J. Adhesion Sci. Tech., 33(9), 921-944, 2019; (Scopus-Q2) (vi) H. Lgaz, S. K. Saha, A. Chaouiki, K. S. Bhat, R. Salghi, P. Banerjee, I. H. Ali, M. I. Khan, Ill-Min Chung, Exploring the potential role of pyrazoline derivatives in corrosion inhibition of mild steel in hydrochloric acid solution: Insights from experimental and computational studies, Const. Build. Mat., 2020, 233, 117320; (Scopus-Q1)
Dr Subrahmanya Bhat K
Manipal Institute Of Technology, Manipal Academy of Higher Education
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This page is a summary of: Assessing the Impact of Electron-Donating-Substituted Chalcones on Inhibition of Mild Steel Corrosion in HCl Solution: Experimental Results and Molecular-level Insights, Colloids and Surfaces A Physicochemical and Engineering Aspects, December 2019, Elsevier,
DOI: 10.1016/j.colsurfa.2019.124366.
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