BIOMASS EXTRACTS FOR MATERIALS PROTECTION: CORROSION INHIBITION OF MILD STEEL IN ACIDIC MEDIA BYTerminalia chebulaEXTRACTS

Autor:	M. A. Chidiebere, C. B. Adindu, Kanayo L. Oguzie, H. Momoh-Yahaya, Emeka E. Oguzie
Rok vydání:	2014
Předmět:	Chemistry General Chemical Engineering Inorganic chemistry General Chemistry Corrosion Dielectric spectroscopy Cathodic protection Terminalia chebula Metal Adsorption visual_art visual_art.visual_art_medium Gravimetric analysis Polarization (electrochemistry)
Zdroj:	Chemical Engineering Communications. 201:790-803
ISSN:	1563-5201 0098-6445
Popis:	The inhibiting action of the fruit extract of Terminalia chebula (TC) on mild steel corrosion in 1 M HCl solution was studied using gravimetric, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) techniques. The experimental results showed that TC functioned as an inhibitor in the acidic corrodent and that corrosion inhibition efficiency increased with extract concentration. Cathodic and anodic polarization curves show that TC functioned as a mixed-type inhibitor, while impedance results show that the extract organic matter was adsorbed at the metal/corrodent interphase. A computational study of the adsorption behavior of some of the organic constituents of the extracts was carried out using density functional theory (DFT). The computations were used to theoretically ascertain the individual contributions of the constituents to the observed corrosion-inhibiting effect of the extract.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3d3fc0293351941e59deb5f4513aa373 https://doi.org/10.1080/00986445.2013.790816 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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