2012
DOI: 10.5155/eurjchem.3.4.426-432.671
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Abstract: KEYWORDSThe inhibition performance of extracts of Ziziphus mauritiana on mild steel corrosion in 0.5 M H2SO4 and 0.5 M HCl was investigated using gravimetric, electrochemical polarization, electrochemical impedance spectroscopy and scanning electron microscopic studies. The gravimetric results indicate that Ziziphus mauritiana leaves extract exhibits good inhibition efficiency in both the acids. Furthermore, the inhibition efficiency decreases with increase in temperature. Polarization measurements showed that… Show more

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Cited by 26 publications
(11 citation statements)
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“…The rate of corrosion is higher in medium without inhibitor compared to the one that has inhibitor. As temperature is increased the rate of corrosion also increased due to the fact that the process of corrosion occurred rapidly at higher temperature due to the hot-movement of inhibitor molecules that weakening the adsorption capacity on mild steel surface (Shivakumar and Mohana, 2012;Norzila and Anis, 2015). On the other hand, the inhibition efficiency of the inhibitor decreases with increased in temperature for both absence and presence of inhibitor.…”
Section: Effect Of Temperature On Corrosionmentioning
confidence: 99%
“…The rate of corrosion is higher in medium without inhibitor compared to the one that has inhibitor. As temperature is increased the rate of corrosion also increased due to the fact that the process of corrosion occurred rapidly at higher temperature due to the hot-movement of inhibitor molecules that weakening the adsorption capacity on mild steel surface (Shivakumar and Mohana, 2012;Norzila and Anis, 2015). On the other hand, the inhibition efficiency of the inhibitor decreases with increased in temperature for both absence and presence of inhibitor.…”
Section: Effect Of Temperature On Corrosionmentioning
confidence: 99%
“…This is due to the physical barrier created by adsorbed molecules on mild steel surface which increased the minimum energy required for corrosion reaction to occurs and the increase in the activation energy values with increasing concentration of the extract further corroborates the fact that inhibition efficiency increases with increase in concentration of the extract. In the present study, a physical adsorption mechanism is proposed since the values of Ea are lower than 80 kJ mol -1 [38], and this happens due to the electrostatic force between negatively charged metal surface and positive charged of organic species The trend of increasing Ea values as with concentration of the inhibitors have been reported by earlier studies on various plant extract such as jujube leaves [39], black pepper [26,40] sunflower leaves [41], banana peels [42] and Alchornea laxiflora leaves [23].…”
Section: Thermodynamic Studiesmentioning
confidence: 73%
“…On consideration of the Langmuir adsorption isotherm [15][16][17] , which is well described by eqn. 3, it has been found that the experimental data gave a straight line graph on a plot of C/θ versus C and fitted the adsorption isotherm as shown in Fig.…”
Section: Effects Of Corrosion Inhibitor Dosage and The Types Of Aminementioning
confidence: 99%
“…Integration 17,18 of the above data as shown in Table-3. From Table-3, the plot of C/θ versus C gives a straight line (Fig.…”
Section: Effects Of Corrosion Inhibitor Dosage and The Types Of Aminementioning
confidence: 99%