کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9572435 | 1503708 | 2005 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In situ and ex situ characterisation of the passive film on a ferritic stainless steel in molten sodium hydroxide
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Voltammetric and electrochemical impedance spectroscopic measurements in combination with ex situ surface analysis are used to characterise the passive state of Fe-18% Cr in molten NaOH at 470 °C. The areas of corrosion, passivity and transpassivity are derived from experimental voltammetric data and thermodynamic considerations. Impedance measurements in a wide potential range are performed to study the conductivity mechanism of the anodic layers formed. The surface composition of the passive film is estimated by X-ray photoelectron spectroscopy and its in-depth composition by Auger electron spectroscopy. A transfer function based on a tentative kinetic model is proposed to describe the impedance spectra. The parameters of the transfer function are determined by best-fit calculation and some of the kinetic and transport parameters characterising the film growth process are estimated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 249, Issues 1â4, 15 August 2005, Pages 162-175
Journal: Applied Surface Science - Volume 249, Issues 1â4, 15 August 2005, Pages 162-175
نویسندگان
Javor Kolchakov, Tzvety Tzvetkoff, Martin Bojinov,