Eco-Friendly Plant Extract of Medicago sativa (Alfalfa) as Corrosion Inhibitor for Carbon Steel in Marine Environment

被引：7

作者：

Fouda, A. S. ^{[1
]}

Emam, A. ^{[2
]}

Refat, R. ^{[3
]}

Nageeb, M. M. ^{[1
]}

机构：

[1] Mansoura Univ, Fac Sci, Dept Chem, Mansoura 35516, Egypt

[2] Suez Canal Univ, Fac Sci, Dept Chem, Ismailia 41522, Egypt

[3] Natl Inst Oceanog & Fisheries, Al Ghardaqa, Egypt

来源：

SURFACE ENGINEERING AND APPLIED ELECTROCHEMISTRY | 2019年 / 55卷 / 03期

关键词：

corrosion inhibition; carbon steel; NaCl; Na2S; Alfalfa extract; adsorption; ELECTROCHEMICAL FREQUENCY-MODULATION; MILD-STEEL; HYDROCHLORIC-ACID; MONITORING CORROSION; LEAVES EXTRACT; GREEN APPROACH; SCHIFF-BASES; ADSORPTION; DISSOLUTION;

D O I：

10.3103/S1068375519030074

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The inhibiting effect of an Alfalfa extract in a corrosive medium (3.5% NaCl + 16 ppm Na2S) on the corrosion of carbon steel was studied by the mass loss measurements, potentiodynamic polarization, and electrochemical impedance spectroscopy. The results showed that the inhibition efficiency, increases with an increase in the extract dose but decreases at higher temperatures. The obtained results indicated that the investigated extract is physically adsorbed on the carbon steel surface and follows the Temkin adsorption isotherm. The polarization data revealed that this extract acts as mixed type inhibitor. The surface morphology was tested using atomic force microscope. The results obtained from different techniques are in good agreement.

引用

页码：294 / 303

页数：10

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