Inhibitory action of aqueous coffee ground extracts on the corrosion of carbon steel in HCl solution

被引：242
作者：
Torres, Vanessa Vasconcelos [1 ]
Amado, Roberto Salgado [1 ]
de Sa, Camila Faia [1 ]
Fernandez, Tatiana Lopez [1 ]
da Silva Riehl, Carlos Alberto [2 ]
Torres, Alexandre Guedes [3 ]
D'Elia, Eliane [1 ]
机构：
[1] UFRJ, Inst Quim, Dept Quim Inorgan, Ctr Tecnol, BR-21941909 Rio De Janeiro, Brazil
[2] UFRJ, Inst Quim, Dept Quim Analit, Ctr Tecnol, BR-21941909 Rio De Janeiro, Brazil
[3] UFRJ, Inst Quim, Lab Bioquim Nutr & Alimentos, Ctr Tecnol, BR-21941909 Rio De Janeiro, Brazil
来源：
CORROSION SCIENCE | 2011年 / 53卷 / 07期
关键词：
Steel; EIS; Polarisation; Weight loss; HYDROCHLORIC-ACID SOLUTION; MILD-STEEL; NATURAL HONEY; C-STEEL; METALS; LACTONES; ALLOYS; MEDIA; WATER; JUICE;
D O I：
10.1016/j.corsci.2011.03.021
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of aqueous extracts of spent coffee grounds on the corrosion of carbon steel in a 1 mol L(-1) HCl were examined. Two methods of extraction were studied: decoction and infusion. The inhibition efficiency of C-steel in 1 mol L(-1) HCl increased as the extract concentration and temperature increased. The coffee extracts acted as a mixed-type inhibitor with predominant cathodic effectiveness. In this study, the adsorption process of components of spent coffee grounds extracts obeyed the Langmuir adsorption isotherm. The chlorogenic acids isolated do not seem to explain the corrosion inhibition observed during the use of the coffee extracts. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2385 / 2392
页数：8
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