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Adsorption and Thermodynamic Studies for Corrosion Inhibition of API 5L X-52 Steel in 2 M HCl Solution by Moxifloxacin

100%
Ikpi M. E., Abeng F. E., Obono O. E.
World News of Natural Sciences
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2017
|
vol. 9
52-61
EN
The inhibition of API 5L X-52 steel corrosion in an acidic medium by moxifloxacin at 303 K, 313 K and 323 K was monitored by potentiodynamic polarization measurement. The concentration of acid medium was maintained throughout the experiment. The inhibition efficiency was found to increased with increase in concentration of moxifloxacin and temperature. Activation energy, adsorption and thermodynamic parameters were evaluated from the study temperature. Herein, moxifloxacin brought about a decrease in activation energy Ea that reflects chemisorption. The adsorption of the moxifloxacin on the steel surface was found to obeyed Langmuir adsorption isotherm ΔGads values, indicating strong and spontaneous adsorption of the moxifloxacin on the surface of API 5L X-52 steel.
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Kinetics and Thermodynamic Studies of Corrosion Inhibition of Mild Steel Using Methanolic Extract of Erigeron floribundus (Kunth) in 2 M HCl Solution

100%
Abeng F. E., Idim V. D., Nna P. J.
World News of Natural Sciences
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2017
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vol. 10
26-38
EN
The investigation of kinetics and thermodynamics of the corrosion of mild steel in a 2 M HCl solution using methanolic extract of Erigeron floribundus was carried out by means of gravimetric techniques. The results obtained indicate that the extract retarded corrosion. The inhibition efficiency was seen to increase with increase in concentration of the inhibitor, as well as with increase in temperature. The values of activation energy (Ea) obtained indicate a chemisorptions mechanism, whereas the value of Gibb free energy (ΔGoads) indicates a spontaneous adsorption of the extract components on the metal surface. Kinetic modelling of the experimental data obeys first order reaction. The adsorption of methanolic extract of Erigeron floribundus onto the mild steel surface followed the Langmuir adsorption isotherm model. Therefore, the extract functions as good corrosion inhibitor for mild steel in hydrochloric acid.
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Corrosion Inhibition of API 5L X52 Carbon Steel by 1-ethyl-3-methylimidazolium-methanesulphonate and 1-ethyl-3-methylimidazolium Acetate Ionic Liquids in Hydrochloric Acid

75%
Edet Ikpi M., Ebri Obono O., Edet Ikpi M., Ebri Obono O.
Archives of Metallurgy and Materials
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2020
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vol. 65
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issue 1
4
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Electrochemical and Quantum Chemical Investigation on Adsorption of Nifedipine as Corrosion Inhibitor at API 5L X-52 Steel / HCl Acid Interface

75%
Ikpi M. E., Abeng F. E., Ikpi M. E., Abeng F. E.
Archives of Metallurgy and Materials
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2020
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vol. 65
|
issue 1
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