High-temperature corrosion of Fe-28Al and Fe-18Al-10Nb in a H2/H2S/H2O gas mixture

W. Kai; S. H. Lee; D. L. Chiang; J. P. Chu

doi:10.1016/s0921-5093(98)00927-7

High-temperature corrosion of Fe-28Al and Fe-18Al-10Nb in a H2/H2S/H2O gas mixture

W. Kai
, S. H. Lee
, D. L. Chiang
, J. P. Chu

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

13 Citations (Scopus)

Abstract

The corrosion behavior of Fe-28Al and Fe-18Al-10Nb (at.%) was investigated over the temperature range of 700-900 °C in a H₂/H₂S/H₂O gas mixture with varying sulfur partial pressures of 10^-2-10³ Pa and oxygen partial pressures of 10^-19-10^-15 Pa. In general, the corrosion kinetics followed the parabolic rate law although two-stage kinetics were noted in some cases. The steady-state parabolic rate constants increased with increasing temperature. Based on the equivalent addition (28 at.%) of alloying elements, it was found that Fe-18Al-10Nb exhibited a better corrosion resistance, being 2.1-3.9 orders of magnitude lower than Fe-28Al (depending on temperature). The scales formed on Fe-28Al consisted of mostly FeS, α-Al₂O₃, and minor FeAl₂S₄, while the scales formed on Fe-18Al-10Nb consisted of mostly α-Al₂O₃, Nb₃S₄, Nb₂O₅, and minor Fe_xNbS₂ (FeNb₂S₄/FeNb₃S₆) at T≤800 °C and of α-Al₂O₃, Nb₃S₄, and Fe_xNbS₂ at 900 °C. The formation of Al₂O₃ and Nb₃S₄ resulted in the significant reduction of corrosion rates.

Original language	English
Pages (from-to)	146-152
Journal	Materials Science and Engineering A
Volume	A258
Issue number	1-2
DOIs	https://doi.org/10.1016/s0921-5093(98)00927-7
Publication status	Published - 1 Jan 1998
Externally published	Yes
Event	Proceedings of the 1998 TMS Annual Meeting - San Antonio, TX, USA Duration: 15 Feb 1998 → 19 Feb 1998

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Access Output

10.1016/s0921-5093(98)00927-7

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{037a8f593eab4ca4a99a9e5ef0d57d18,

title = "High-temperature corrosion of Fe-28Al and Fe-18Al-10Nb in a H2/H2S/H2O gas mixture",

abstract = "The corrosion behavior of Fe-28Al and Fe-18Al-10Nb (at.\%) was investigated over the temperature range of 700-900 °C in a H2/H2S/H2O gas mixture with varying sulfur partial pressures of 10-2-103 Pa and oxygen partial pressures of 10-19-10-15 Pa. In general, the corrosion kinetics followed the parabolic rate law although two-stage kinetics were noted in some cases. The steady-state parabolic rate constants increased with increasing temperature. Based on the equivalent addition (28 at.\%) of alloying elements, it was found that Fe-18Al-10Nb exhibited a better corrosion resistance, being 2.1-3.9 orders of magnitude lower than Fe-28Al (depending on temperature). The scales formed on Fe-28Al consisted of mostly FeS, α-Al2O3, and minor FeAl2S4, while the scales formed on Fe-18Al-10Nb consisted of mostly α-Al2O3, Nb3S4, Nb2O5, and minor FexNbS2 (FeNb2S4/FeNb3S6) at T≤800 °C and of α-Al2O3, Nb3S4, and FexNbS2 at 900 °C. The formation of Al2O3 and Nb3S4 resulted in the significant reduction of corrosion rates.",

author = "W. Kai and Lee, \{S. H.\} and Chiang, \{D. L.\} and Chu, \{J. P.\}",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].; Proceedings of the 1998 TMS Annual Meeting ; Conference date: 15-02-1998 Through 19-02-1998",

year = "1998",

month = jan,

day = "1",

doi = "10.1016/s0921-5093(98)00927-7",

language = "English",

volume = "A258",

pages = "146--152",

journal = "Materials Science and Engineering A",

issn = "0921-5093",

publisher = "Elsevier Ltd.",

number = "1-2",

}

TY - JOUR

T1 - High-temperature corrosion of Fe-28Al and Fe-18Al-10Nb in a H2/H2S/H2O gas mixture

AU - Kai, W.

AU - Lee, S. H.

AU - Chiang, D. L.

AU - Chu, J. P.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 1998/1/1

Y1 - 1998/1/1

N2 - The corrosion behavior of Fe-28Al and Fe-18Al-10Nb (at.%) was investigated over the temperature range of 700-900 °C in a H2/H2S/H2O gas mixture with varying sulfur partial pressures of 10-2-103 Pa and oxygen partial pressures of 10-19-10-15 Pa. In general, the corrosion kinetics followed the parabolic rate law although two-stage kinetics were noted in some cases. The steady-state parabolic rate constants increased with increasing temperature. Based on the equivalent addition (28 at.%) of alloying elements, it was found that Fe-18Al-10Nb exhibited a better corrosion resistance, being 2.1-3.9 orders of magnitude lower than Fe-28Al (depending on temperature). The scales formed on Fe-28Al consisted of mostly FeS, α-Al2O3, and minor FeAl2S4, while the scales formed on Fe-18Al-10Nb consisted of mostly α-Al2O3, Nb3S4, Nb2O5, and minor FexNbS2 (FeNb2S4/FeNb3S6) at T≤800 °C and of α-Al2O3, Nb3S4, and FexNbS2 at 900 °C. The formation of Al2O3 and Nb3S4 resulted in the significant reduction of corrosion rates.

AB - The corrosion behavior of Fe-28Al and Fe-18Al-10Nb (at.%) was investigated over the temperature range of 700-900 °C in a H2/H2S/H2O gas mixture with varying sulfur partial pressures of 10-2-103 Pa and oxygen partial pressures of 10-19-10-15 Pa. In general, the corrosion kinetics followed the parabolic rate law although two-stage kinetics were noted in some cases. The steady-state parabolic rate constants increased with increasing temperature. Based on the equivalent addition (28 at.%) of alloying elements, it was found that Fe-18Al-10Nb exhibited a better corrosion resistance, being 2.1-3.9 orders of magnitude lower than Fe-28Al (depending on temperature). The scales formed on Fe-28Al consisted of mostly FeS, α-Al2O3, and minor FeAl2S4, while the scales formed on Fe-18Al-10Nb consisted of mostly α-Al2O3, Nb3S4, Nb2O5, and minor FexNbS2 (FeNb2S4/FeNb3S6) at T≤800 °C and of α-Al2O3, Nb3S4, and FexNbS2 at 900 °C. The formation of Al2O3 and Nb3S4 resulted in the significant reduction of corrosion rates.

UR - https://www.scopus.com/pages/publications/0032585445

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-0032585445&origin=recordpage

U2 - 10.1016/s0921-5093(98)00927-7

DO - 10.1016/s0921-5093(98)00927-7

M3 - RGC 21 - Publication in refereed journal

SN - 0921-5093

VL - A258

SP - 146

EP - 152

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

IS - 1-2

T2 - Proceedings of the 1998 TMS Annual Meeting

Y2 - 15 February 1998 through 19 February 1998

ER -

High-temperature corrosion of Fe-28Al and Fe-18Al-10Nb in a H2/H2S/H2O gas mixture

Abstract

Bibliographical note

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Cite this