In-situ electrochemical impedance spectroscopy measurements of zirconium alloy oxide conductivity: Relationship to hydrogen pickup

Adrien Couet, Arthur Thompson Motta, Antoine Ambard, Didier Livigni

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Hydrogen pickup during nuclear fuel cladding corrosion is a critical life-limiting degradation mechanism for nuclear fuel. Following a program dedicated to zirconium alloys, corrosion, it has been hypothesized that oxide electronic resistivity determines hydrogen pickup. In-situ electrochemical impedance spectroscopy experiments were performed on Zircaloy-4 and Zr-2.5Nb alloys in 360 °C water. The oxide resistivity was measured as function of time. The results show that as the oxide resistivity increases so does the hydrogen pickup fraction. The resistivity of the oxide layer formed on Zircaloy-4 is higher than on Zr-2.5Nb, resulting in a higher hydrogen pickup fraction of Zircaloy-4, compared to Zr-2.5Nb.

Original languageEnglish (US)
Pages (from-to)1-13
Number of pages13
JournalCorrosion Science
Volume119
DOIs
StatePublished - May 1 2017

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Zirconium alloys
Pickups
Electrochemical impedance spectroscopy
Oxides
Hydrogen
Nuclear fuel cladding
Corrosion
Nuclear fuels
Degradation
Water
Experiments

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

Cite this

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abstract = "Hydrogen pickup during nuclear fuel cladding corrosion is a critical life-limiting degradation mechanism for nuclear fuel. Following a program dedicated to zirconium alloys, corrosion, it has been hypothesized that oxide electronic resistivity determines hydrogen pickup. In-situ electrochemical impedance spectroscopy experiments were performed on Zircaloy-4 and Zr-2.5Nb alloys in 360 °C water. The oxide resistivity was measured as function of time. The results show that as the oxide resistivity increases so does the hydrogen pickup fraction. The resistivity of the oxide layer formed on Zircaloy-4 is higher than on Zr-2.5Nb, resulting in a higher hydrogen pickup fraction of Zircaloy-4, compared to Zr-2.5Nb.",
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In-situ electrochemical impedance spectroscopy measurements of zirconium alloy oxide conductivity : Relationship to hydrogen pickup. / Couet, Adrien; Motta, Arthur Thompson; Ambard, Antoine; Livigni, Didier.

In: Corrosion Science, Vol. 119, 01.05.2017, p. 1-13.

Research output: Contribution to journalArticle

TY - JOUR

T1 - In-situ electrochemical impedance spectroscopy measurements of zirconium alloy oxide conductivity

T2 - Relationship to hydrogen pickup

AU - Couet, Adrien

AU - Motta, Arthur Thompson

AU - Ambard, Antoine

AU - Livigni, Didier

PY - 2017/5/1

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AB - Hydrogen pickup during nuclear fuel cladding corrosion is a critical life-limiting degradation mechanism for nuclear fuel. Following a program dedicated to zirconium alloys, corrosion, it has been hypothesized that oxide electronic resistivity determines hydrogen pickup. In-situ electrochemical impedance spectroscopy experiments were performed on Zircaloy-4 and Zr-2.5Nb alloys in 360 °C water. The oxide resistivity was measured as function of time. The results show that as the oxide resistivity increases so does the hydrogen pickup fraction. The resistivity of the oxide layer formed on Zircaloy-4 is higher than on Zr-2.5Nb, resulting in a higher hydrogen pickup fraction of Zircaloy-4, compared to Zr-2.5Nb.

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