Synchrotron X-ray radiography studies of pitting corrosion of stainless steel: Extraction of pit propagation parameters

Seyed Ghahari; Donal Krouse; Nicholas Laycock; Trevor Rayment; Cristiano Padovani; Marco Stampanoni; Federica Marone; Rajmund Mokso; Alison J. Davenport

doi:10.1016/j.corsci.2015.06.023

Synchrotron X-ray radiography studies of pitting corrosion of stainless steel: Extraction of pit propagation parameters

Seyed Ghahari, Donal Krouse, Nicholas Laycock, Trevor Rayment, Cristiano Padovani, Marco Stampanoni, Federica Marone, Rajmund Mokso, Alison J. Davenport

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Abstract

In situ synchrotron X-ray radiography was used to observe the evolution of 2D pits growing at the edge of stainless steel foils in chloride solutions of varying concentrations under current and potential control. A method was developed for measuring the local anodic current density along the perimeter of pits from the rate of advance of the pit into the metal. Pit depth tends to increase with time with kinetics consistent with diffusion control (under a salt layer), whereas lateral development (on film-free surfaces) is influenced by solution conductivity. Perforated covers formed on pits control their growth and stability.

Original language	English
Pages (from-to)	23-35
Journal	Corrosion Science
Volume	100
Early online date	21 Jul 2015
DOIs	https://doi.org/10.1016/j.corsci.2015.06.023
Publication status	Published - 1 Nov 2015

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10.1016/j.corsci.2015.06.023

Ghahari_et_al_2015_Synchrotron_X_ray_radiography_Corrosion_Science
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http://linkinghub.elsevier.com/retrieve/pii/S0010938X15002954

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 = "Synchrotron X-ray radiography studies of pitting corrosion of stainless steel: Extraction of pit propagation parameters",

abstract = "In situ synchrotron X-ray radiography was used to observe the evolution of 2D pits growing at the edge of stainless steel foils in chloride solutions of varying concentrations under current and potential control. A method was developed for measuring the local anodic current density along the perimeter of pits from the rate of advance of the pit into the metal. Pit depth tends to increase with time with kinetics consistent with diffusion control (under a salt layer), whereas lateral development (on film-free surfaces) is influenced by solution conductivity. Perforated covers formed on pits control their growth and stability.",

author = "Seyed Ghahari and Donal Krouse and Nicholas Laycock and Trevor Rayment and Cristiano Padovani and Marco Stampanoni and Federica Marone and Rajmund Mokso and Davenport, {Alison J.}",

year = "2015",

month = nov,

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doi = "10.1016/j.corsci.2015.06.023",

language = "English",

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journal = "Corrosion Science",

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T1 - Synchrotron X-ray radiography studies of pitting corrosion of stainless steel: Extraction of pit propagation parameters

AU - Ghahari, Seyed

AU - Krouse, Donal

AU - Laycock, Nicholas

AU - Rayment, Trevor

AU - Padovani, Cristiano

AU - Stampanoni, Marco

AU - Marone, Federica

AU - Mokso, Rajmund

AU - Davenport, Alison J.

PY - 2015/11/1

Y1 - 2015/11/1

N2 - In situ synchrotron X-ray radiography was used to observe the evolution of 2D pits growing at the edge of stainless steel foils in chloride solutions of varying concentrations under current and potential control. A method was developed for measuring the local anodic current density along the perimeter of pits from the rate of advance of the pit into the metal. Pit depth tends to increase with time with kinetics consistent with diffusion control (under a salt layer), whereas lateral development (on film-free surfaces) is influenced by solution conductivity. Perforated covers formed on pits control their growth and stability.

AB - In situ synchrotron X-ray radiography was used to observe the evolution of 2D pits growing at the edge of stainless steel foils in chloride solutions of varying concentrations under current and potential control. A method was developed for measuring the local anodic current density along the perimeter of pits from the rate of advance of the pit into the metal. Pit depth tends to increase with time with kinetics consistent with diffusion control (under a salt layer), whereas lateral development (on film-free surfaces) is influenced by solution conductivity. Perforated covers formed on pits control their growth and stability.

U2 - 10.1016/j.corsci.2015.06.023

DO - 10.1016/j.corsci.2015.06.023

M3 - Article

SN - 0010938X

VL - 100

SP - 23

EP - 35

JO - Corrosion Science

JF - Corrosion Science

ER -

Synchrotron X-ray radiography studies of pitting corrosion of stainless steel: Extraction of pit propagation parameters

Abstract

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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