Pyridinium Bromide Derivatives as Corrosion Inhibitors For Mild Steel in 1M H2SO4 | ||||
| Egyptian Journal of Chemistry | ||||
| Volume 66, Issue 2, February 2023, Page 63-72 PDF (993.04 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2022.126742.5625 | ||||
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| Authors | ||||
Mohammad Mouayad Ahmed  ; Mehdi Salih Shihab
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| Department of Chemistry, College of Science, Al-Nahrain University, Baghdad, Iraq | ||||
| Abstract | ||||
| In this work, we present a study on the synthesis and characterization of a new series of pyridinium salts, namely 4-(2-((1E,2E)-3-phenylallylidene)hydrazine-1-carbothioamido)-1-propylpyridin-1-ium bromide, P1; (E)-3-(2-(4-(dimethylamino)benzylidene)hydrazine-1-carbothioamido)-1-ethylpyridin-1-ium bromide, P2; (E)-3-(2-(4-(dimethylamino)benzylidene)hydrazine-1-carbothioamido)-1-propylpyridin-1-ium bromide, P3; using spectroscopic techniques such as IR and 1H NMR, as well as the evaluation of their ability to inhibit mild steel corrosion in 1 M H2SO4 at 20 °C using weight loss techniques and scanning electron microscopy. The investigation yielded that the Schiff bases and Pyridinium salts derivatives were successfully synthesized as suggested by the characterization results. In 1 M H2SO4 solution, Pyridinium salts derivatives showed substantial inhibitive activities for mild steel corrosion. Their inhibition efficiencies increased with increasing concentration of inhibitors. The adsorption of the studied compounds on the surface of mild steel follows the Langmuir isotherm model. | ||||
| Keywords | ||||
| Corrosion inhibition; Pyridinium salt; mild steel; H2SO4; weight loss measurements; scanning electron microscopy | ||||
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