Unlocking corrosion defense: investigating Schiff base derivatives for enhanced mild steel protection in acidic environments

• I.A. Annon¹, K.K. Jlood¹, N. Betti², T.S. Gaaz³, M.M. Hanoon¹, F.F. Sayyid¹, A.M. Mustafa¹ and A.A. Alamiery^4,5

¹ Department of Production Engineering and Metallurgical, University of Technology, Baghdad P.O. Box 10001, Iraq
² Materials Engineering Department, University of Technology-Iraq, Baghdad 10001, Iraq
³ Air Conditioning and Refrigeration Techniques Engineering Department, College of Engineering and Technologies, Al-Mustaqbal University, Babylon 51001, Iraq
⁴ University of Technology, Baghdad P.O. Box 10001, Iraq
⁵ University Kebangsaan Malaysia, Bangi P.O. Box 43000, Selangor, Malaysia

Abstract: This study explores the potential of a compound named 1-(2,4,6-trihydroxyphenyl)ethanone thiosemicarbazone (TET) to protect mild steel from rusting in a harsh acidic environment (hydrochloric acid). We tested how well TET performs at different temperatures and exposure times. The results show that TET can be highly effective in preventing corrosion, achieving a maximum protection of almost 90%. Interestingly, its effectiveness increases as you add more TET, but decreases slightly at higher temperatures. Further analysis suggests that TET forms a protective layer on the steel surface. To understand this process better, we used computer modeling to examine the molecule’s structure and properties. This analysis revealed factors that contribute to TET’s ability to inhibit corrosion. Overall, this research provides valuable insights into TET’s potential as a corrosion inhibitor. It paves the way for designing even more effective and environmentally friendly solutions to protect metals from rust.

Keywords: corrosion inhibitor, density functional theory, Schiff base, Langmuir adsorption isotherm, mild steel alloy

Int. J. Corros. Scale Inhib., 2024, 13, no. 2, 727-749
doi: 10.17675/2305-6894-2024-13-2-5

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