Temperature Performance of a Thione Quinoxaline Compound as Mild Steel Corrosion Inhibitor in Hydrochloric Acid Medium

被引：1

作者：

El-Hajjaji, F. ^{[1
]}

Belkhmima, R. A. ^{[2
]}

Zerga, B. ^{[1
]}

Sfaira, M. ^{[1
]}

Taleb, M. ^{[1
]}

Touhami, M. Ebn ^{[2
]}

Hammouti, B. ^{[3
]}

Al-Deyaband, S. S. ^{[4
]}

Ebenso, Eno ^{[5
]}

机构：

[1] Univ Sidi Mohammed Ben Abdellah, Fac Sci Dhar El Mahraz, LIMME, Lab Ingn Mat Modelisat & Environm, Atlas Fes 30000, Morocco

[2] Univ Ibn Tofail, Fac Sci, Lab Mat Electrochim & Environm, Kenitra 14000, Morocco

[3] Univ Mohammed Premier, Fac Sci, LCAE URAC18, Oujda 60000, Morocco

[4] King Saud Univ, Coll Sci, Dept Chem, Riaydh 11451, Saudi Arabia

[5] North West Univ, Fac Agr Sci & Technol, Mat Sci Innovat & Modelling MaSIM Res Focus Area, ZA-2735 Mmabatho, South Africa

来源：

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2014年 / 9卷 / 09期

关键词：

Quinoxaline; Adsorption; Corrosion inhibition; Thermodynamic and Kinetic proprieties; THERMODYNAMIC CHARACTERIZATION; ADSORPTION; COST; BEHAVIOR; OIL;

D O I：

暂无

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The inhibiting action of 3-methyl-1-prop-2-ynylquinoxaline-2(1H)-thione (Pr-N-Q=S) on mild steel in molar hydrochloric acid has been investigated in the temperature range from 35 to 80 degrees C using weight loss measurements. It was shown that the inhibition efficiency increased with Pr-N-Q=S concentration and remained constant and so higher close to 96 % at 10(-3)M though temperature rising. The apparent activation energies (E-a), enthalpies (Delta H*) and entropies of activation (Delta S*) values provided evidence of the inhibitory effect of Pr-N-Q=S. Langmuir isotherm model fitted well the adsorption of Pr-N-Q=S onto metallic surface in acidic media. Furthermore, spontaneity of the adsorption process, evaluated from the sign of free energy (Delta(ads)G(degrees)) values, showed a decrease upon temperature increase in the presence of Pr-N-Q=S.

引用

页码：4721 / 4731

页数：11

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