کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9675917 | 1454110 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Inhibition effect of two organic compounds pyridine-pyrazole type in acidic corrosion of steel
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The inhibition of the corrosion of steel in 1 M HCl by two pyridine-pyrazole type organic compounds N-containing: (5-methyl-1-pyridin-2-yl-1H-pyrazol-3-yl)methanol (P1) and ethyl 5-methyl-1-pyridin-2-yl-1H-pyrazol-3-carboxylate (P2) has been studied at 308 K by weight loss, electrochemical polarisation, polarisation resistance and electrochemical impedance spectroscopy (EIS) measurements. The inhibition efficiencies obtained from cathodic Tafel plots gravimetric and EIS methods were in good agreement. The results obtained reveal that these compounds are efficient inhibitors. The inhibition efficiency increases with the increase of inhibitor concentration and reached 94% for P1 at 10â3 M. Potentiodynamic polarisation studies clearly reveal that the presence of inhibitors P1 and P2 does not change the mechanism of hydrogen evolution and that they act essentially as cathodic inhibitors. The temperature effect on the corrosion behaviour of steel in 1 M HCl without and with the inhibitors at 10â3 M was studied in the temperature range from 308 to 353 K. The inhibitors were adsorbed on the steel surface according to the Frumkin adsorption isotherm model. From the adsorption isotherm some thermodynamic data for the adsorption process (f, K and ÎG°ads) are calculated and discussed. EIS measurements show that the increase of the transfer resistance with the inhibitor concentration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 259, Issues 1â3, 31 May 2005, Pages 143-149
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 259, Issues 1â3, 31 May 2005, Pages 143-149
نویسندگان
K. Tebbji, H. Oudda, B. Hammouti, M. Benkaddour, M. El Kodadi, A. Ramdani,