4.3 Article

The adsorption and inhibition efficiency of 2-amino-4-methoxy-6-methyl-1,3,5-triazine for corrosion of mild steel in hydrochloric acid solution

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EMERALD GROUP PUBLISHING LTD
DOI: 10.1108/ACMM-05-2023-2816

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Organic corrosion inhibitor; Adsorption; Acid solution; Quantum chemical calculations

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The study aims to prevent corrosion of mild steel (MS) in 0.5 M HCl solution using 2-amino-4-methoxy-6-methyl-1,3,5-triazine. The effectiveness of the corrosion inhibitor was determined through electrochemical, surface, and theoretical calculation techniques. The study found that the inhibitor exhibited a high inhibitive activity, with an efficiency of 95.7% in the acid solution.
PurposeThis study aims to prevent mild steel (MS) against corrosion in 0.5 M HCl solution, 2-amino-4-methoxy-6-methyl-1,3,5-triazine was used. The effectiveness of the compound as a corrosion inhibitor was studied via electrochemical, surface and theoretical calculation techniques. Design/methodology/approachFor concentrations ranging from 0.5 to 10.0 mM, almost similar polarization resistances were obtained from electrochemical impedance spectroscopy (EIS) and linear polarization resistance tests. It also investigated inhibitive activity of 2-amino-4-methoxy-6-methyl-1,3,5-triazine on the steel surface using scanning electron and atomic force microscope instruments. Langmuir adsorption is the best matched isotherm for the adsorption of the inhibitor to the steel surface. FindingsEIS method was used to determine inhibition efficiency, which was determined to be 95.7% for 10.0 mM inhibitor containing acid solution. Density functional theory's predictions for quantum chemistry agreed well with the other experimental results. Originality/valueThe methods used in this study are effective and applicable; the used organic inhibitor is 2-amino-4-methoxy-6-methyl-1,3,5-triazine; and protective effectiveness is important, which is crucial for the task of MS corrosion prevention.

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