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Analytical and Bioanalytical Electrochemistry، جلد ۱۲، شماره ۴، صفحات ۴۳۷-۴۵۷
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عنوان انگلیسی Marine Octocoral Phyllogorgia dilatata: Identification of Sesquiterpenes and Activity as a Natural and Renewable Corrosion Inhibitor
چکیده انگلیسی مقاله 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) w::as char::acterized 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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نویسندگان مقاله Caio Machado Fernandes |
Materials Laboratory, Chemistry Institute, Federal Fluminense University, Niterói, Rio de Janeiro, 24020-141, Brazil

Thayssa Da S. F. Fagundes |
Natural Products Laboratory, Chemistry Institute, Federal Fluminense University, Niterói, Rio de Janeiro, 24020-141, Brazil

Nazir E. Dos Santos |
Materials Laboratory, Chemistry Institute, Federal Fluminense University, Niterói, Rio de Janeiro, 24020-141, Brazil

Bruno Sergio Do Amaral |
Separare - Chromatography Research Center, Chemistry Department, Federal University of São Carlos, São Carlos, São Paulo, 13565-905, Brazil

Quezia B. Cass |
Separare - Chromatography Research Center, Chemistry Department, Federal University of São Carlos, São Carlos, São Paulo, 13565-905, Brazil

Alessandra L. Valverde |
Federal Institute of Education, Science and Technology of São Paulo - Campus Pirituba, São Paulo, São Paulo, 05110-000, Brazil

Júlio César M. Silva |
Materials Laboratory, Chemistry Institute, Federal Fluminense University, Niterói, Rio de Janeiro, 24020-141, Brazil

Odivaldo C. Alves |
Materials Laboratory, Chemistry Institute, Federal Fluminense University, Niterói, Rio de Janeiro, 24020-141, Brazil

Eduardo A. Ponzio |
Materials Laboratory, Chemistry Institute, Federal Fluminense University, Niterói, Rio de Janeiro, 24020-141, Brazil

نشانی اینترنتی http://www.abechem.com/article_39214_e2013789725ff2961e0bdb3b342aaf73.pdf
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/377/article-377-2396911.pdf
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