Mechanistic studies of atmospheric pitting corrosion of stainless steel for ILW containers

A. J. Davenport; L. Guo; N. Mi; H. Mohammed-Ali; Majid Ghahari; S. R. Street; N. J. Laycock; T. Rayment; C. Reinhard; C. Padovani; D. Krouse

doi:10.1179/1743278214Y.0000000183

Mechanistic studies of atmospheric pitting corrosion of stainless steel for ILW containers

A. J. Davenport^*, L. Guo, N. Mi, H. Mohammed-Ali, Majid Ghahari, S. R. Street, N. J. Laycock, T. Rayment, C. Reinhard, C. Padovani, D. Krouse

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

Atmospheric pitting corrosion of stainless steel was examined with synchrotron X-ray microtomography, laboratory based tests and electrochemical measurements in order to provide a mechanistic basis for the development of corrosion prediction models. It was found that the morphology of corrosion pits was affected by the presence of residual ferrite, and some pits showed dense covers that may affect pit stability. Fluctuations in relative humidity may lead to partial or complete repassivation of pits, sometimes leading to the formation of new pits. Electrochemical measurements in artificial pits containing concentrated salt solutions show a strong dependence of the diffusion limited current density on chloride concentration.

Original language	English
Pages (from-to)	514-520
Number of pages	7
Journal	Corrosion Engineering Science and Technology
Volume	49
Issue number	6
DOIs	https://doi.org/10.1179/1743278214Y.0000000183
Publication status	Published - 3 Jun 2014

Keywords

Atmospheric pitting corrosion
Stainless steel
X-ray microtomography

ASJC Scopus subject areas

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

Access to Document

10.1179/1743278214Y.0000000183Licence: None: All rights reserved

https://doi.org/10.1179/1743278214Y.0000000183Licence: None: All rights reserved

In situ time-dependent characterisation of corrosion processes in nuclear waste storage and GDF environments (UOB Lead)
Davenport, A.
Engineering & Physical Science Research Council
1/10/11 → 30/09/15
Project: Research Councils
Microfocus Synchrotron X-Ray Studies of Localised Corrosion
Rayment, T. & Davenport, A.
Engineering & Physical Science Research Council
5/09/07 → 4/09/11
Project: Research Councils

Cite this

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title = "Mechanistic studies of atmospheric pitting corrosion of stainless steel for ILW containers",

abstract = "Atmospheric pitting corrosion of stainless steel was examined with synchrotron X-ray microtomography, laboratory based tests and electrochemical measurements in order to provide a mechanistic basis for the development of corrosion prediction models. It was found that the morphology of corrosion pits was affected by the presence of residual ferrite, and some pits showed dense covers that may affect pit stability. Fluctuations in relative humidity may lead to partial or complete repassivation of pits, sometimes leading to the formation of new pits. Electrochemical measurements in artificial pits containing concentrated salt solutions show a strong dependence of the diffusion limited current density on chloride concentration.",

keywords = "Atmospheric pitting corrosion, Stainless steel, X-ray microtomography",

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T1 - Mechanistic studies of atmospheric pitting corrosion of stainless steel for ILW containers

AU - Davenport, A. J.

AU - Guo, L.

AU - Mi, N.

AU - Mohammed-Ali, H.

AU - Ghahari, Majid

AU - Street, S. R.

AU - Laycock, N. J.

AU - Rayment, T.

AU - Reinhard, C.

AU - Padovani, C.

AU - Krouse, D.

PY - 2014/6/3

Y1 - 2014/6/3

N2 - Atmospheric pitting corrosion of stainless steel was examined with synchrotron X-ray microtomography, laboratory based tests and electrochemical measurements in order to provide a mechanistic basis for the development of corrosion prediction models. It was found that the morphology of corrosion pits was affected by the presence of residual ferrite, and some pits showed dense covers that may affect pit stability. Fluctuations in relative humidity may lead to partial or complete repassivation of pits, sometimes leading to the formation of new pits. Electrochemical measurements in artificial pits containing concentrated salt solutions show a strong dependence of the diffusion limited current density on chloride concentration.

AB - Atmospheric pitting corrosion of stainless steel was examined with synchrotron X-ray microtomography, laboratory based tests and electrochemical measurements in order to provide a mechanistic basis for the development of corrosion prediction models. It was found that the morphology of corrosion pits was affected by the presence of residual ferrite, and some pits showed dense covers that may affect pit stability. Fluctuations in relative humidity may lead to partial or complete repassivation of pits, sometimes leading to the formation of new pits. Electrochemical measurements in artificial pits containing concentrated salt solutions show a strong dependence of the diffusion limited current density on chloride concentration.

KW - Atmospheric pitting corrosion

KW - Stainless steel

KW - X-ray microtomography

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DO - 10.1179/1743278214Y.0000000183

M3 - Article

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VL - 49

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JO - Corrosion Engineering Science and Technology

JF - Corrosion Engineering Science and Technology

IS - 6

ER -

Mechanistic studies of atmospheric pitting corrosion of stainless steel for ILW containers

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

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Projects

In situ time-dependent characterisation of corrosion processes in nuclear waste storage and GDF environments (UOB Lead)

Microfocus Synchrotron X-Ray Studies of Localised Corrosion

Cite this