Studies On The Inhibitive Effect Of 3-Hydroxyflavone On The Acid Corrosion Of Mild Steel
AbstractThe corrosion inhibition effect of 3-hydroxyflavone was studied on mild steel in 1 M hydrochloric acid (HCl). The anticorrosive effect was evaluated by weight loss and electrochemical methods which include Tafel polarization and AC impedance studies at 300 K. In weight loss method, the inhibition efficiency increased with increase in inhibitor concentration, and decreased with increase in temperature and immersion time, and acid concentration. The inhibitor showed maximum efficiency of 91% at 4 × 10-4 M concentration in 1 M hydrochloric acid. The Tafel polarization study showed that the inhibitor behaves likely as cathodic type. The corrosion inhibition effect measured by weight loss method and electrochemical studies was in good agreement with each other. The surface analysis was done by using scanning electron microscope (SEM). Several adsorption isotherms are assessed to study the adsorption behavior of the inhibitor on the mild steel surface. The negative value of ΔGads indicates the spontaneous adsorption of the inhibitor on mild steel surface.
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Bibliographic InfoArticle provided by World Scientific Publishing Co. Pte. Ltd. in its journal Surface Review and Letters.
Volume (Year): 16 (2009)
Issue (Month): 06 ()
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Web page: http://www.worldscinet.com/srl/srl.shtml
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