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TitleSynchrotron X-ray radiography studies of pitting corrosion of stainless steel: Extraction of pit propagation parameters
Publication TypeJournal Article
Year of Publication2015
AuthorsGhahari, M., Krouse D.P., Laycock N., Rayment T., Padovani C., Stampanoni M., Marone F., Mokso R., and Davenport A.J.
JournalCorrosion Science
Pagination23 - 35
Date Published2015
ISSN0010938X (ISSN)
KeywordsAnodic current density, Corrosion, crystallography, Electrochemical calculation, Galvanostatics, In-situ synchrotrons, Pitting, Potentiostatics, Solution conductivity, Stainless steel, Stainless steel foil, Synchrotron x-ray radiography, X ray radiography
AbstractIn 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. © 2015 The Authors.

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