کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5410009 | 1506554 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Gravimetric and electrochemical evaluation of three nonionic dithiol surfactants as corrosion inhibitors for mild steel in 1Â M HCl solution
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
At three different temperatures 25, 40 and 55 °C, three newly dithiol nonionic surfactants were evaluated as corrosion inhibitors for mild steel in 1 M HCl. Three different techniques were used for evaluation; weight loss at the three different temperatures, the potentiodynamic and impedance methods were studied at 25 °C. From the obtained results, the synthesized dithiol surfactants have good inhibition efficiency and significantly increase by increasing the concentration. Increasing temperatures show two different trends; at low concentration, the efficiencies decrease, while at higher concentration the efficiencies increase for the three surfactants. From the electrochemical polarization data, the prepared dithiol surfactant behaves as a mixed-type of inhibitors for carbon steel in 1 M HCl. Double-layer capacitances obtained from electrochemical impedance of synthesized surfactant decrease compared to the blank one when they be added due to the adsorption process to the metal steel surface. The Villamil adsorption isotherm was found to be the more fitted model describing the adsorption process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 216, April 2016, Pages 392-400
Journal: Journal of Molecular Liquids - Volume 216, April 2016, Pages 392-400
نویسندگان
Samy M. Shaban, Ali A. Abd-Elaal, Salah M. Tawfik,