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On the Mechanism of Corrosion of Terfenol-D (Tb0.3Dy0.7Fe1.92).

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Title: On the Mechanism of Corrosion of Terfenol-D (Tb0.3Dy0.7Fe1.92).
Authors: Sachdeva, Deepika1, Balasubramaniam, R.1 baIa@iitk.ac.in
Source: Journal of The Electrochemical Society. Jul2008, Vol. 155 Issue 7, pC315-C323. 9p. 1 Chart, 1 Graph.
Subjects: Reaction mechanisms (Chemistry), Corrosion resistant materials, Polarization (Electricity), Immersion in liquids, Scanning electron microscopy, Fourier transform infrared spectroscopy, Rare earth metals, Iron, Coating processes
Abstract: The effect of constituent elements Tb, Dy, and Fe on corrosion of Terfenol-D (Tb0.3Dy0.7Fe1.92) was studied by potentiodynamic polarization studies in freely aerated, deaerated, and fully aerated 3.5% NaCl and 0.01 N Na2SO4 solutions. The corrosion products obtained from immersion and cyclic spray tests were characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The polarization behavior of Terfenol-D closely resembled that of pure iron in all environments. Characterization of spalled corrosion products after immersion testing revealed a higher rare earth (RE) content. An increase in iron content of the adherent corrosion products with increasing duration of exposure pointed Out the significant role of iron in the general corrosion processes of Terfenol-D. The polarization and characterization results have been related to the dealloying corrosion mechanism, wherein selective dissolution of REs from the surface results in corrosion from an essentially iron-enriched surface. [ABSTRACT FROM AUTHOR]
Copyright of Journal of The Electrochemical Society is the property of IOP Publishing 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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  Data: On the Mechanism of Corrosion of Terfenol-D (Tb<subscript>0.3</subscript>Dy<subscript>0.7</subscript>Fe<subscript>1.92</subscript>).
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  Data: <searchLink fieldCode="AR" term="%22Sachdeva%2C+Deepika%22">Sachdeva, Deepika</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Balasubramaniam%2C+R%2E%22">Balasubramaniam, R.</searchLink><relatesTo>1</relatesTo><i> baIa@iitk.ac.in</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+The+Electrochemical+Society%22">Journal of The Electrochemical Society</searchLink>. Jul2008, Vol. 155 Issue 7, pC315-C323. 9p. 1 Chart, 1 Graph.
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  Data: <searchLink fieldCode="DE" term="%22Reaction+mechanisms+%28Chemistry%29%22">Reaction mechanisms (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Corrosion+resistant+materials%22">Corrosion resistant materials</searchLink><br /><searchLink fieldCode="DE" term="%22Polarization+%28Electricity%29%22">Polarization (Electricity)</searchLink><br /><searchLink fieldCode="DE" term="%22Immersion+in+liquids%22">Immersion in liquids</searchLink><br /><searchLink fieldCode="DE" term="%22Scanning+electron+microscopy%22">Scanning electron microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Fourier+transform+infrared+spectroscopy%22">Fourier transform infrared spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Rare+earth+metals%22">Rare earth metals</searchLink><br /><searchLink fieldCode="DE" term="%22Iron%22">Iron</searchLink><br /><searchLink fieldCode="DE" term="%22Coating+processes%22">Coating processes</searchLink>
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  Data: The effect of constituent elements Tb, Dy, and Fe on corrosion of Terfenol-D (Tb0.3Dy0.7Fe1.92) was studied by potentiodynamic polarization studies in freely aerated, deaerated, and fully aerated 3.5% NaCl and 0.01 N Na2SO4 solutions. The corrosion products obtained from immersion and cyclic spray tests were characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The polarization behavior of Terfenol-D closely resembled that of pure iron in all environments. Characterization of spalled corrosion products after immersion testing revealed a higher rare earth (RE) content. An increase in iron content of the adherent corrosion products with increasing duration of exposure pointed Out the significant role of iron in the general corrosion processes of Terfenol-D. The polarization and characterization results have been related to the dealloying corrosion mechanism, wherein selective dissolution of REs from the surface results in corrosion from an essentially iron-enriched surface. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of The Electrochemical Society is the property of IOP Publishing 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: 10.1149/1.2908880
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        Text: English
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        Type: general
      – SubjectFull: Corrosion resistant materials
        Type: general
      – SubjectFull: Polarization (Electricity)
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      – SubjectFull: Immersion in liquids
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      – SubjectFull: Scanning electron microscopy
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      – SubjectFull: Fourier transform infrared spectroscopy
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      – SubjectFull: Rare earth metals
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      – SubjectFull: Iron
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      – SubjectFull: Coating processes
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      – TitleFull: On the Mechanism of Corrosion of Terfenol-D (Tb0.3Dy0.7Fe1.92).
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            NameFull: Sachdeva, Deepika
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            NameFull: Balasubramaniam, R.
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              Text: Jul2008
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              Y: 2008
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