کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9567479 | 1503717 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Inhibitive action of two bipyrazolic isomers towards corrosion of 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
The inhibitive action of two isomers of bipyrazolic type, namely, 4-{bis[(1,5-dimethyl-1H-pyrazolyl-3-yl)methyl]amino}phenol (isomer 1) and 4-{bis[(3,5-dimethyl-1H-pyrazolyl-1-yl)methyl]-amino}phenol (isomer 2), against the corrosion of steel in 1Â M hydrochloric acid solution has been investigated at 308Â K using weight loss measurements, polarisation and impedance spectroscopy methods. The inhibition efficiencies evaluated from the methods used are in good agreement. The polarisation curves reveal that these bipyrazolic compounds act as mixed-type inhibitors. These studies show that these compounds are efficient inhibitors. Inhibition efficiencies reach about 95% for isomer 1 and 2 at 5 Ã 10â4Â M. The temperature effect on the corrosion behaviour of steel in 1Â M HCl with and without the bipyrazolic compounds is studied in the temperature range from 308 to 353Â K at 5 Ã 10â4Â M. The activation energy for steel corrosion is determined. The isomers adsorb on the steel surface according to a Temkin isotherm adsorption model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 241, Issues 3â4, 15 March 2005, Pages 326-334
Journal: Applied Surface Science - Volume 241, Issues 3â4, 15 March 2005, Pages 326-334
نویسندگان
K. Tebbji, H. Oudda, B. Hammouti, M. Benkaddour, M. El kodadi, F. Malek, A. Ramdani,