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Marine Octocoral Phyllogorgia dilatata: Identification of Sesquiterpenes and Activity as a Natural and Renewable Corrosion Inhibitor
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نویسنده
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fernandes caio machado ,fagundes thayssa da s. f. ,santos nazir e. dos ,amaral bruno sergio do ,cass quezia b. ,valverde alessandra l. ,silva júlio césar m. ,alves odivaldo c. ,ponzio eduardo a.
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منبع
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analytical and bioanalytical electrochemistry - 2020 - دوره : 12 - شماره : 4 - صفحه:437 -457
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چکیده
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In the context of highly efficient, non-toxic and natural organic corrosion inhibitors, phyllogorgia dilatata was studied as an anticorrosive for mild steel in acid medium. the marine octocoral crude extract (pdce) was characterized and analyzed by lc-hrms, revealing the presence of 16 different organic molecules. the corrosion inhibition was evaluated via weight loss study and electrochemical techniques. the obtained polarization curves showed that pdce acts as a mixed- type inhibitor and gravimetric, electrochemical impedance spectroscopy and linear polarization resistance analyses reached an average maximum anticorrosive efficiency of 93.4% at 1 g l^-1. the data crossing between gravimetric and electrochemical measurements indicated that the protection mechanism is due to adsorption, blocking electro-active sites. the adsorption data followed the freundlich theory and sem/edx images confirmed the formation of a protective multilayer film.
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کلیدواژه
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Phyllogorgia dilatata ,Natural corrosion inhibitor ,Mild steel ,Acidic medium Electrochemical measurements ,Surface characterization
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آدرس
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federal fluminense university, chemistry institute, materials laboratory, Brazil, federal fluminense university, chemistry institute, natural products laboratory, Brazil, federal fluminense university, chemistry institute, materials laboratory, Brazil, federal university of são carlos, separare - chromatography research center, chemistry department, Brazil. federal institute of education, science and technology of são paulo, campus pirituba, Brazil, federal university of são carlos, separare - chromatography research center, chemistry department, Brazil, federal institute of education, science and technology of são paulo, campus pirituba, Brazil, federal fluminense university, chemistry institute, materials laboratory, Brazil, federal fluminense university, chemistry institute, materials laboratory, Brazil, federal fluminense university, chemistry institute, materials laboratory, Brazil
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پست الکترونیکی
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eduardoariel@id.uff.br
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Authors
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