Khillah extract as inhibitor for acid corrosion of SX 316 steel

被引：174
作者：
El-Etre, A. Y. [1 ]
机构：
[1] Benha Univ, Fac Sci, Dept Chem, Banha 13815, Egypt
来源：
APPLIED SURFACE SCIENCE | 2006年 / 252卷 / 24期
关键词：
acid inhibition; natural product; khillah; steel; 316;
D O I：
10.1016/j.apsusc.2005.11.066
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The inhibitive effect of the extract of khillah (Ammi visnaga) seeds, on the corrosion of SX 316 steel in HCl solution was determined using weight loss measurements as well as potentiostatic technique. It was found that the presence of the extract reduces markedly the corrosion rate of steel in the acid solution. The inhibition efficiency increases as the extract concentration is increased. The inhibitive effect of khillah extract was discussed on the basis of adsorption of its components on the metal surface. Negative values were calculated for the energy of adsorption indicating the spontaneity of the adsorption process. The formation of insoluble complexes as a result of interaction between iron cations and khellin, which present in the extract, was also discussed. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：8521 / 8525
页数：5
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