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On the Oxidation Resistance of Alloy 800HT Exposed in Supercritical Water (SCW).

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Title: On the Oxidation Resistance of Alloy 800HT Exposed in Supercritical Water (SCW).
Authors: Mahboubi, S.1 mahbos@mcmaster.ca, Bottom, G. A.1, Kish, J. R.1
Source: Corrosion. Aug2015, Vol. 71 Issue 8, p992-1002. 11p.
Subjects: Corrosion resistance, Microscopy, Transmission electron microscopy, Magnetite, Martensite, Supercritical water
Abstract: The purpose of this study was to examine the structure and composition of the oxide scales formed on Alloy 800HT in a supercritical environment after a relatively short exposure time (circa 500 h) to provide a more complete physical description of the metallurgical factors that influence the protectiveness of the scale formed. This was achieved using transmission electron microscopy and associated techniques on site-specific cross-section samples prepared by focused ion beam milling No physical evidence in support of oxide scale exfoliation was found. Rather, the formation of the discontinuous magnetite (Fe3O4) outer nodular layer is believed to be controlled to a large extent by the underlying microstructure and the presence of ε-martensite plates in particular. The formation of a thin compact corundum-type ([Cr,Fe]2O3) base scale is considered to be sufficiently encouraging to justify an effort to reduce or eliminate the small volume fraction of E-martensite from the starting microstructure of Alloy 800HT as a means to optimize the corrosion resistance. [ABSTRACT FROM AUTHOR]
Copyright of Corrosion is the property of Association for Materials Protection & Performance (AMPP) and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: On the Oxidation Resistance of Alloy 800HT Exposed in Supercritical Water (SCW).
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  Data: <searchLink fieldCode="JN" term="%22Corrosion%22">Corrosion</searchLink>. Aug2015, Vol. 71 Issue 8, p992-1002. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Corrosion+resistance%22">Corrosion resistance</searchLink><br /><searchLink fieldCode="DE" term="%22Microscopy%22">Microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Transmission+electron+microscopy%22">Transmission electron microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetite%22">Magnetite</searchLink><br /><searchLink fieldCode="DE" term="%22Martensite%22">Martensite</searchLink><br /><searchLink fieldCode="DE" term="%22Supercritical+water%22">Supercritical water</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: The purpose of this study was to examine the structure and composition of the oxide scales formed on Alloy 800HT in a supercritical environment after a relatively short exposure time (circa 500 h) to provide a more complete physical description of the metallurgical factors that influence the protectiveness of the scale formed. This was achieved using transmission electron microscopy and associated techniques on site-specific cross-section samples prepared by focused ion beam milling No physical evidence in support of oxide scale exfoliation was found. Rather, the formation of the discontinuous magnetite (Fe3O4) outer nodular layer is believed to be controlled to a large extent by the underlying microstructure and the presence of ε-martensite plates in particular. The formation of a thin compact corundum-type ([Cr,Fe]2O3) base scale is considered to be sufficiently encouraging to justify an effort to reduce or eliminate the small volume fraction of E-martensite from the starting microstructure of Alloy 800HT as a means to optimize the corrosion resistance. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Group: Ab
  Data: <i>Copyright of Corrosion is the property of Association for Materials Protection & Performance (AMPP) and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.5006/1677
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      – Code: eng
        Text: English
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      – SubjectFull: Corrosion resistance
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      – SubjectFull: Microscopy
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      – SubjectFull: Transmission electron microscopy
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      – SubjectFull: Magnetite
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      – SubjectFull: Martensite
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      – SubjectFull: Supercritical water
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              M: 08
              Text: Aug2015
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