The effect of pre-heat treatment of AluChrom 318 on the corrosion behaviour and Cr evaporation in SOFC Cathode Air Pre-heater

Kun ZHANG; Ahmad El-Kharouf; Robert Steinberger-Wilckens

doi:10.1149/09101.2253ecst

The effect of pre-heat treatment of AluChrom 318 on the corrosion behaviour and Cr evaporation in SOFC Cathode Air Pre-heater

Kun ZHANG, Ahmad El-Kharouf, Robert Steinberger-Wilckens

Research output: Contribution to journal › Conference article › peer-review

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Abstract

An extremely low Cr evaporation rate was confirmed for the alumina-forming alloy (AluChrom 318) used in an SOFC Cathode Air Pre-Heater application in our previous work. In the current study, a pre-heat treatment was applied on the AluChrom 318 in order to achieve the formation of a protective alumina scale prior to SOFC application, further decreasing the oxidation rate and Cr evaporation. To examine this further, the effect of pre-heat treatment on the AluChrom 318 was investigated with two variables, namely; temperature (800 to 1100 °C) and dwelling time (0.5 to 4 hours). The results in this study show that the AluChrom 318 pre-treated at 1100 °C for 1 hour will form an α-Al₂O₃ scale leading to a 98% reduction of oxidation rate and 90% reduction of Cr evaporation compared to the non-treated AluChrom 318 under simulated SOFC cathode conditions.

Original language	English
Pages (from-to)	2253-2260
Number of pages	8
Journal	ECS Transactions
Volume	91
Issue number	1
DOIs	https://doi.org/10.1149/09101.2253ecst
Publication status	Published - 8 Sept 2019
Event	16th International Symposium on Solid Oxide Fuel Cells: SOFC XVI - Kyoto, Japan Duration: 8 Sept 2019 → 13 Sept 2019 Conference number: 16

Keywords

SOFC
Degradation
Heat exchanger
Passivation
FeCrAlY steel

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Metals and Alloys
Energy Engineering and Power Technology
Surfaces, Coatings and Films

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10.1149/09101.2253ecstLicence: None: All rights reserved

Zhang_et_al_The_effect_of_pre-heat_treatment_of_AluChrom_318_ECS_Transactions_2019
© The Electrochemical Society, Inc. 2019. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in Zhang et al (2019) The effect of pre-heat treatment of AluChrom 318 on the corrosion behaviour and Cr evaporation in SOFC Cathode Air Pre-heater, ECS Transactions, 91 (1) 2253-2260. https://doi.org/10.1149/09101.2253ecst
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Cite this

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title = "The effect of pre-heat treatment of AluChrom 318 on the corrosion behaviour and Cr evaporation in SOFC Cathode Air Pre-heater",

abstract = "An extremely low Cr evaporation rate was confirmed for the alumina-forming alloy (AluChrom 318) used in an SOFC Cathode Air Pre-Heater application in our previous work. In the current study, a pre-heat treatment was applied on the AluChrom 318 in order to achieve the formation of a protective alumina scale prior to SOFC application, further decreasing the oxidation rate and Cr evaporation. To examine this further, the effect of pre-heat treatment on the AluChrom 318 was investigated with two variables, namely; temperature (800 to 1100 °C) and dwelling time (0.5 to 4 hours). The results in this study show that the AluChrom 318 pre-treated at 1100 °C for 1 hour will form an α-Al2O3 scale leading to a 98% reduction of oxidation rate and 90% reduction of Cr evaporation compared to the non-treated AluChrom 318 under simulated SOFC cathode conditions.",

keywords = "SOFC, Degradation, Heat exchanger, Passivation, FeCrAlY steel",

author = "Kun ZHANG and Ahmad El-Kharouf and Robert Steinberger-Wilckens",

year = "2019",

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journal = "ECS Transactions",

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note = "16th International Symposium on Solid Oxide Fuel Cells : SOFC XVI, SOFC-XVI ; Conference date: 08-09-2019 Through 13-09-2019",

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AU - ZHANG, Kun

AU - El-Kharouf, Ahmad

AU - Steinberger-Wilckens, Robert

N1 - Conference code: 16

PY - 2019/9/8

Y1 - 2019/9/8

N2 - An extremely low Cr evaporation rate was confirmed for the alumina-forming alloy (AluChrom 318) used in an SOFC Cathode Air Pre-Heater application in our previous work. In the current study, a pre-heat treatment was applied on the AluChrom 318 in order to achieve the formation of a protective alumina scale prior to SOFC application, further decreasing the oxidation rate and Cr evaporation. To examine this further, the effect of pre-heat treatment on the AluChrom 318 was investigated with two variables, namely; temperature (800 to 1100 °C) and dwelling time (0.5 to 4 hours). The results in this study show that the AluChrom 318 pre-treated at 1100 °C for 1 hour will form an α-Al2O3 scale leading to a 98% reduction of oxidation rate and 90% reduction of Cr evaporation compared to the non-treated AluChrom 318 under simulated SOFC cathode conditions.

AB - An extremely low Cr evaporation rate was confirmed for the alumina-forming alloy (AluChrom 318) used in an SOFC Cathode Air Pre-Heater application in our previous work. In the current study, a pre-heat treatment was applied on the AluChrom 318 in order to achieve the formation of a protective alumina scale prior to SOFC application, further decreasing the oxidation rate and Cr evaporation. To examine this further, the effect of pre-heat treatment on the AluChrom 318 was investigated with two variables, namely; temperature (800 to 1100 °C) and dwelling time (0.5 to 4 hours). The results in this study show that the AluChrom 318 pre-treated at 1100 °C for 1 hour will form an α-Al2O3 scale leading to a 98% reduction of oxidation rate and 90% reduction of Cr evaporation compared to the non-treated AluChrom 318 under simulated SOFC cathode conditions.

KW - SOFC

KW - Degradation

KW - Heat exchanger

KW - Passivation

KW - FeCrAlY steel

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The effect of pre-heat treatment of AluChrom 318 on the corrosion behaviour and Cr evaporation in SOFC Cathode Air Pre-heater

Abstract

Keywords

ASJC Scopus subject areas

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