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Corrosion Inhibition of 2-Amino-5 Ethyl-1, 3, 4-Thiadiazole on Mild Steel in Hydrochloric Acid

Loto, R. T. and Loto, C. A. and Popoola, A. P. I. (2014) Corrosion Inhibition of 2-Amino-5 Ethyl-1, 3, 4-Thiadiazole on Mild Steel in Hydrochloric Acid. Canadian Journal of Pure and Applied Sciences, 8 (3). pp. 3091-3103. ISSN 1920-3853, Print ISSN: 1715-9997

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Corrosion inhibition of mild steel in 0.5M hydrochloric acid solutions by 2- amino- 5 ethyl- 1, 3, 4-thiadiazole(TTD) was studied using weight loss, open circuit potential measurement and potentiodynamic polarization technique. The compoundshowedmaximum inhibition efficiency of 93.7 and 97% at highest TTD concentration from weight-loss and potentiodynamic polarization test. Results from corrosion potential monitoring showed the inhibiting compound well within passivation values throughout the exposure period.Inhibition efficiency varied with inhibitor concentration and the mechanism of inhibition is attributed to chemical interaction and adsorption form thermodynamic calculations. Adsorption of the compound obeyed the Langmuir and Frumkin isotherm model. Scanning electron microscopy characterization showed the formation of protective precipitates on the steel surface while statistical derivations confirmed the overwhelming statistical significance of inhibitor concentration against exposure time on inhibition efficiency.

Item Type: Article
Uncontrolled Keywords: Corrosion; thiadiazole; hydrochloric acid, steel, inhibition
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 18 Dec 2014 10:51
Last Modified: 18 Dec 2014 10:51

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