کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10269149 | 459718 | 2011 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cathodic activities of oxygen and hydrogen on carbon steel in simulated fuel-grade ethanol
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Cathodic reactions, specially the oxygen and hydrogen activities, have been extensively investigated on carbon steel in simulated fuel-grade ethanol (SFGE) environments using cathodic potentiodynamic polarization and electrochemical impedance spectroscopy. Under normal conditions, oxygen reduction is the major cathodic reaction for carbon steel in SFGE. Hydrogen evolution, confirmed by hydrogen permeation test, is activated by de-aeration and at much higher cathodic overpotential. The dissociation of acetic acid in SFGE enhances the proton related cathodic reactions. Water in ethanol can increase the proton dissociation rate, resulting in a higher cathodic current density. At potentials close to free corrosion potential, the reduction of surface oxidized products contributes to the cathodic activities in SFGE. Based on this study, the possible effects of cathodic reactions on corrosion of carbon steel in SFGE are also discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 56, Issue 5, 1 February 2011, Pages 2312-2320
Journal: Electrochimica Acta - Volume 56, Issue 5, 1 February 2011, Pages 2312-2320
نویسندگان
Xiaoyuan Lou, Preet M. Singh,