Corrosion inhibition of carbon steel in 1 M H2SO4 solution by Thapsia villosa extracts

被引：17
|
作者：
Kalla, A. [1 ]
Benahmed, M. [1 ]
Djeddi, N. [1 ]
Akkal, S. [2 ]
Laouer, H. [3 ]
机构：
[1] Univ Larbi Tebessi, Lab Mol Bioact & Applicat, Route Constantine, Tebessa 12000, Algeria
[2] Univ Mentouri Constantine, Lab Phytochim & Anal Physicochim & Biol, Dept Chim, Fac Sci Exactes, Route Ain el Bey, Constantine 25000, Algeria
[3] Univ Ferhat Abbas Setif 1, Dept Biol & Ecol Vegetale, Lab Valorisat Ressources Nat Biol, Setif, Algeria
来源：
INTERNATIONAL JOURNAL OF INDUSTRIAL CHEMISTRY | 2016年 / 7卷 / 04期
关键词：
Carbon steel; Corrosion; EIS; Potentiodynamic polarization; Plant extract; Weight loss;
D O I：
10.1007/s40090-016-0094-8
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Ethyl acetate extract (EAE) and butanolic extract (BE) of Thapsia villosa were investigated as corrosion inhibitors of Carbon Steel (CS) in 1 M H2SO4 using electrochemical impedance spectroscopy (EIS) techniques, potentiodynamic polarization and weight loss measurements. The effect of temperature on the corrosion behavior of CS was studied in the range of 20-40 degrees C. The experimental results show that EAE and BE are good corrosion inhibitors and the protection efficiency increased with increasing concentration of the extracts, but decrease with rise in temperature. The EAE and BE act as a mixed types inhibitors. The adsorption of extracts on CS surface follow Langmuir isotherm. The apparent energies, enthalpies and entropies of the dissolution process were discussed.
引用
收藏
页码：419 / 429
页数：11
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