Evidence of caffeine adsorption on a low-carbon steel surface in ethanol

被引：40

作者：

da Trindade, Leticia Guerreiro ^{[1
]}

Goncalves, Reinaldo Simoes ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Sul, Inst Quim, BR-91501970 Porto Alegre, RS, Brazil

来源：

CORROSION SCIENCE | 2009年 / 51卷 / 08期

关键词：

Low alloy steel; Organic coatings; Cyclic voltammetry; Polarization; Neutral inhibition; CORROSION INHIBITION; MILD-STEEL; PROPARGYL ALCOHOL; ORGANIC-COMPOUNDS; ACID; DERIVATIVES; ALLOYS; METALS; IRON; BEHAVIOR;

D O I：

10.1016/j.corsci.2009.03.038

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Different electrochemical methods have been employed in order to confirm the ability of caffeine (1,3,7-trimethylxanthine) to adsorb to low-carbon steel in ethanol solutions and thereby inhibit the corrosion process. The interaction between the organic compound and the electrode surface was dependent on the electrode potential and the maximum interaction was observed at -0.30 V (Ag/AgCl). The presence of the organic compound adsorbed on a low-carbon steel electrode surface was confirmed by comparing the voltammograms, Tafel plots and EIS curves of the electrode in the absence and presence of caffeine. The standard free energy of adsorption confirms a spontaneous chemical adsorption step. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1578 / 1583

页数：6

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