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Evaluation of chitosan and carboxymethyl cellulose as ecofriendly corrosion inhibitors for steel

Umoren, Saviour A. and AlAhmary, Abdullah A. and Gasem, Zuhair M. and Solomon, Moses M. (2018) Evaluation of chitosan and carboxymethyl cellulose as ecofriendly corrosion inhibitors for steel. International Journal of Biological Macromolecules, 117. pp. 1017-1028.

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The study was aimed at establishing the possibility of using eco-friendly natural polymers to formulate corrosion inhibitors for sweet oil field environment. Against this background, the performance of two natural polymers; chitosan and carboxymethyl cellulose (CMC) as single component corrosion inhibitors in comparison with a commercial inhibitor formulations, on API 5L X60 pipeline steel in CO2 saturated 3.5% NaCl solution were investigated using electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) techniques; complemented with surface morphology characterization of the corroded steel samples without and with inhibitors using scanning electron microscope (SEM). The results indicate that there is a remarkable difference in inhibition efficiency of each inhibitor on the API 5L X60 steel and the commercial inhibitor formulations. Inhibition efficiency increasedwith the increase of inhibitors' concentrations. Immersion timewas found to have a profound effect on the corrosion inhibition performance of all the inhibitors. Also the inhibition efficiency was found to decreasewith the increase in temperature. Potentiodynamic polarization results reveal amixed-type inhibition for all inhibitors. The adsorption of each inhibitor on the steel surface obeys Langmuir's isotherm.

Item Type: Article
Uncontrolled Keywords: Polymers Corrosion inhibitors Chitosan Carboxymethyl cellulose Sweet corrosion Carbon steel
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Engineering, Science and Mathematics > School of Chemistry
Depositing User: nwokealisi
Date Deposited: 22 Mar 2023 15:36
Last Modified: 22 Mar 2023 15:36

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