CORROSION INHIBITION OF 2-AMINO-5 ETHYL-1, 3, 4-THIADIAZOLE ON MILD STEEL IN HYDROCHLORIC ACID Page No: 3091-3103

Roland Tolulope Loto, Cleophas Akintoye Loto and Patricia Abimbola Popoola

Keywords: Corrosion; thiadiazole; hydrochloric acid, steel, inhibition

Abstract: 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.



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