A mixed-conduction model for the oxidation of stainless steel in a high-temperature electrolyte: Estimation of kinetic parameters of oxide layer growth and restructuring

Martin Bojinov (Corresponding Author), Petri Kinnunen, Klas Lundgren, Gunnar Wikmark

Research output: Contribution to journalArticleScientificpeer-review

55 Citations (Scopus)

Abstract

The oxide films formed on AISI 316L(NG) in the temperature range 150-300°C have been characterized by impedance spectroscopy and ex situ analysis using Auger electron spectroscopy. Relatively thick films containing a high concentration of mobile defects form on stainless steel in a high-temperature borate electrolyte, but their impedance response is most probably controlled by the properties of a thin barrier sublayer. The ability of the mixed conduction model for passive films to reproduce the experimental impedance data in both alloy/oxide/electrolyte and alloy/oxide/inert metal configurations has been tested. A procedure for the calculation of the kinetic constants of the interfacial reactions of point defect generation/consumption, as well as those characterizing the transport rates of ionic/electronic defects in the oxide, has been developed. The effect of temperature on the kinetic and transport parameters has been assessed, and the relevance of these parameters for the corrosion behavior of stainless steel in a high-temperature electrolyte is discussed. The results show that the nature of the barrier layer does not change drastically with temperature, although the growth mechanism of the oxide film is different at 150-300°C than at room temperature.
Original languageEnglish
Pages (from-to)B250-B261
Number of pages12
JournalJournal of the Electrochemical Society
Volume152
Issue number7
DOIs
Publication statusPublished - 2005
MoE publication typeA1 Journal article-refereed

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Stainless Steel
Kinetic parameters
Oxides
Electrolytes
Stainless steel
Oxidation
Temperature
Oxide films
Defects
Borates
Kinetics
Point defects
Auger electron spectroscopy
Surface chemistry
Thick films
Metals
Spectroscopy
Corrosion

Cite this

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title = "A mixed-conduction model for the oxidation of stainless steel in a high-temperature electrolyte: Estimation of kinetic parameters of oxide layer growth and restructuring",
abstract = "The oxide films formed on AISI 316L(NG) in the temperature range 150-300°C have been characterized by impedance spectroscopy and ex situ analysis using Auger electron spectroscopy. Relatively thick films containing a high concentration of mobile defects form on stainless steel in a high-temperature borate electrolyte, but their impedance response is most probably controlled by the properties of a thin barrier sublayer. The ability of the mixed conduction model for passive films to reproduce the experimental impedance data in both alloy/oxide/electrolyte and alloy/oxide/inert metal configurations has been tested. A procedure for the calculation of the kinetic constants of the interfacial reactions of point defect generation/consumption, as well as those characterizing the transport rates of ionic/electronic defects in the oxide, has been developed. The effect of temperature on the kinetic and transport parameters has been assessed, and the relevance of these parameters for the corrosion behavior of stainless steel in a high-temperature electrolyte is discussed. The results show that the nature of the barrier layer does not change drastically with temperature, although the growth mechanism of the oxide film is different at 150-300°C than at room temperature.",
author = "Martin Bojinov and Petri Kinnunen and Klas Lundgren and Gunnar Wikmark",
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journal = "Journal of the Electrochemical Society",
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A mixed-conduction model for the oxidation of stainless steel in a high-temperature electrolyte : Estimation of kinetic parameters of oxide layer growth and restructuring. / Bojinov, Martin (Corresponding Author); Kinnunen, Petri; Lundgren, Klas; Wikmark, Gunnar.

In: Journal of the Electrochemical Society, Vol. 152, No. 7, 2005, p. B250-B261.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - A mixed-conduction model for the oxidation of stainless steel in a high-temperature electrolyte

T2 - Estimation of kinetic parameters of oxide layer growth and restructuring

AU - Bojinov, Martin

AU - Kinnunen, Petri

AU - Lundgren, Klas

AU - Wikmark, Gunnar

N1 - Project code: G5SU01109

PY - 2005

Y1 - 2005

N2 - The oxide films formed on AISI 316L(NG) in the temperature range 150-300°C have been characterized by impedance spectroscopy and ex situ analysis using Auger electron spectroscopy. Relatively thick films containing a high concentration of mobile defects form on stainless steel in a high-temperature borate electrolyte, but their impedance response is most probably controlled by the properties of a thin barrier sublayer. The ability of the mixed conduction model for passive films to reproduce the experimental impedance data in both alloy/oxide/electrolyte and alloy/oxide/inert metal configurations has been tested. A procedure for the calculation of the kinetic constants of the interfacial reactions of point defect generation/consumption, as well as those characterizing the transport rates of ionic/electronic defects in the oxide, has been developed. The effect of temperature on the kinetic and transport parameters has been assessed, and the relevance of these parameters for the corrosion behavior of stainless steel in a high-temperature electrolyte is discussed. The results show that the nature of the barrier layer does not change drastically with temperature, although the growth mechanism of the oxide film is different at 150-300°C than at room temperature.

AB - The oxide films formed on AISI 316L(NG) in the temperature range 150-300°C have been characterized by impedance spectroscopy and ex situ analysis using Auger electron spectroscopy. Relatively thick films containing a high concentration of mobile defects form on stainless steel in a high-temperature borate electrolyte, but their impedance response is most probably controlled by the properties of a thin barrier sublayer. The ability of the mixed conduction model for passive films to reproduce the experimental impedance data in both alloy/oxide/electrolyte and alloy/oxide/inert metal configurations has been tested. A procedure for the calculation of the kinetic constants of the interfacial reactions of point defect generation/consumption, as well as those characterizing the transport rates of ionic/electronic defects in the oxide, has been developed. The effect of temperature on the kinetic and transport parameters has been assessed, and the relevance of these parameters for the corrosion behavior of stainless steel in a high-temperature electrolyte is discussed. The results show that the nature of the barrier layer does not change drastically with temperature, although the growth mechanism of the oxide film is different at 150-300°C than at room temperature.

U2 - 10.1149/1.1931447

DO - 10.1149/1.1931447

M3 - Article

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SP - B250-B261

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

SN - 0013-4651

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