Electrochemical and microstructural characterization of alloy 600 in low pressure h                         2                         -Steam

L. Volpe; G. Bertali; M. Curioni; M. G. Burke; F. Scenini

doi:10.1007/978-3-030-04639-2_26

Electrochemical and microstructural characterization of alloy 600 in low pressure h ₂ -Steam

L. Volpe
, G. Bertali
, M. Curioni
, M. G. Burke
, F. Scenini

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

Low pressure superheated H ₂ -steam system has been extensively used in the past years to accelerate the oxidation kinetics while keeping the conditions representative to PWR primary water. One of the most important requirements of this environment is that needs to replicate the Ni/NiO transition. However, despite several studies have been carried out by different research groups in H ₂ -steam environment, there is still some level of uncertainty over the thermodynamic of the oxidation process. In this study, the Ni/NiO transition in hydrogenated steam was investigated via electrochemical potential measurements using a Ni/NiO solid state reference electrode. Furthermore, solution annealed Alloy 600 coupons were exposed to H ₂ -steam at 480 ℃ in order to examine the effect of oxidizing conditions with respect to the Ni/NiO transition on the preferential intergranular oxidation. The effect of the redox potential on the preferential intergranular oxidation is discussed in the context of the precursor stages of stress corrosion cracking for Alloy 600.

Original language	English
Title of host publication	Minerals, Metals and Materials Series
Publisher	Springer International Publishing
Pages	409-422
Number of pages	14
ISBN (Print)	9783030046385, 9783030046392, 9783319515403, 9783319651354, 9783319728520, 9783319950211
DOIs	https://doi.org/10.1007/978-3-030-04639-2_26
State	Published - 2019
Externally published	Yes
Event	18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019 - Boston, United States Duration: Aug 18 2019 → Aug 22 2019

Publication series

Name	Minerals, Metals and Materials Series
ISSN (Print)	2367-1181
ISSN (Electronic)	2367-1696

Conference

Conference	18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019
Country/Territory	United States
City	Boston
Period	08/18/19 → 08/22/19

Keywords

Alloy 600
Grain boundary migration
Ni/NiO
Preferential intergranular oxidation
Redox potential

Access to Document

10.1007/978-3-030-04639-2_26

Cite this

Volpe, L., Bertali, G., Curioni, M., Burke, M. G., & Scenini, F. (2019). Electrochemical and microstructural characterization of alloy 600 in low pressure h ₂ -Steam In Minerals, Metals and Materials Series (pp. 409-422). (Minerals, Metals and Materials Series). Springer International Publishing. https://doi.org/10.1007/978-3-030-04639-2_26

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title = " Electrochemical and microstructural characterization of alloy 600 in low pressure h 2 -Steam ",

abstract = " Low pressure superheated H 2 -steam system has been extensively used in the past years to accelerate the oxidation kinetics while keeping the conditions representative to PWR primary water. One of the most important requirements of this environment is that needs to replicate the Ni/NiO transition. However, despite several studies have been carried out by different research groups in H 2 -steam environment, there is still some level of uncertainty over the thermodynamic of the oxidation process. In this study, the Ni/NiO transition in hydrogenated steam was investigated via electrochemical potential measurements using a Ni/NiO solid state reference electrode. Furthermore, solution annealed Alloy 600 coupons were exposed to H 2 -steam at 480 ℃ in order to examine the effect of oxidizing conditions with respect to the Ni/NiO transition on the preferential intergranular oxidation. The effect of the redox potential on the preferential intergranular oxidation is discussed in the context of the precursor stages of stress corrosion cracking for Alloy 600.",

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Volpe, L, Bertali, G, Curioni, M, Burke, MG & Scenini, F 2019, Electrochemical and microstructural characterization of alloy 600 in low pressure h ₂ -Steam in Minerals, Metals and Materials Series. Minerals, Metals and Materials Series, Springer International Publishing, pp. 409-422, 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019, Boston, United States, 08/18/19. https://doi.org/10.1007/978-3-030-04639-2_26

Electrochemical and microstructural characterization of alloy 600 in low pressure h ₂ -Steam . / Volpe, L.; Bertali, G.; Curioni, M. et al.
Minerals, Metals and Materials Series. Springer International Publishing, 2019. p. 409-422 (Minerals, Metals and Materials Series).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Electrochemical and microstructural characterization of alloy 600 in low pressure h 2 -Steam

AU - Volpe, L.

AU - Bertali, G.

AU - Curioni, M.

AU - Burke, M. G.

AU - Scenini, F.

PY - 2019

Y1 - 2019

N2 - Low pressure superheated H 2 -steam system has been extensively used in the past years to accelerate the oxidation kinetics while keeping the conditions representative to PWR primary water. One of the most important requirements of this environment is that needs to replicate the Ni/NiO transition. However, despite several studies have been carried out by different research groups in H 2 -steam environment, there is still some level of uncertainty over the thermodynamic of the oxidation process. In this study, the Ni/NiO transition in hydrogenated steam was investigated via electrochemical potential measurements using a Ni/NiO solid state reference electrode. Furthermore, solution annealed Alloy 600 coupons were exposed to H 2 -steam at 480 ℃ in order to examine the effect of oxidizing conditions with respect to the Ni/NiO transition on the preferential intergranular oxidation. The effect of the redox potential on the preferential intergranular oxidation is discussed in the context of the precursor stages of stress corrosion cracking for Alloy 600.

AB - Low pressure superheated H 2 -steam system has been extensively used in the past years to accelerate the oxidation kinetics while keeping the conditions representative to PWR primary water. One of the most important requirements of this environment is that needs to replicate the Ni/NiO transition. However, despite several studies have been carried out by different research groups in H 2 -steam environment, there is still some level of uncertainty over the thermodynamic of the oxidation process. In this study, the Ni/NiO transition in hydrogenated steam was investigated via electrochemical potential measurements using a Ni/NiO solid state reference electrode. Furthermore, solution annealed Alloy 600 coupons were exposed to H 2 -steam at 480 ℃ in order to examine the effect of oxidizing conditions with respect to the Ni/NiO transition on the preferential intergranular oxidation. The effect of the redox potential on the preferential intergranular oxidation is discussed in the context of the precursor stages of stress corrosion cracking for Alloy 600.

KW - Alloy 600

KW - Grain boundary migration

KW - Ni/NiO

KW - Preferential intergranular oxidation

KW - Redox potential

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DO - 10.1007/978-3-030-04639-2_26

M3 - Conference contribution

AN - SCOPUS:85064063585

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SN - 9783030046392

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PB - Springer International Publishing

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Y2 - 18 August 2019 through 22 August 2019

ER -

Volpe L, Bertali G, Curioni M, Burke MG, Scenini F. Electrochemical and microstructural characterization of alloy 600 in low pressure h ₂ -Steam In Minerals, Metals and Materials Series. Springer International Publishing. 2019. p. 409-422. (Minerals, Metals and Materials Series). doi: 10.1007/978-3-030-04639-2_26