Characterisation of salt films on dissolving metal surfaces in artificial corrosion pits via in situ synchrotron X-ray diffraction

The salt films formed on metal surfaces dissolving inside artificial corrosion pits formed in 1 M HCl have been probed with synchrotron X-ray diffraction. NiCl 2 · 6H 2O is the main phase in the salt film on nickel, whereas salt films on both iron and 316 L stainless steel are predominantly FeCl 2 ·...

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Bibliographic Details
Published in:Electrochemistry communications 2008-06, Vol.10 (6), p.855-858
Main Authors: Rayment, Trevor, Davenport, Alison J., Dent, Andrew J., Tinnes, Jean-Philippe, Wiltshire, Richard J.K., Martin, Christopher, Clark, Graham, Quinn, Paul, Mosselmans, J. Fred W.
Format: Article
Language:English
Subjects:
Applied sciences
Chemical Sciences
Corrosion
Corrosion mechanisms
Exact sciences and technology
Material chemistry
Metals. Metallurgy
Pitting
Salt film
Synchrotron
X-ray diffraction
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Summary:The salt films formed on metal surfaces dissolving inside artificial corrosion pits formed in 1 M HCl have been probed with synchrotron X-ray diffraction. NiCl 2 · 6H 2O is the main phase in the salt film on nickel, whereas salt films on both iron and 316 L stainless steel are predominantly FeCl 2 · 4H 2O. However, the salt film on iron has a very fine homogeneous crystallite size whereas that on stainless steel is much coarser. The potential-dependence of the film formed on iron has been determined.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2008.03.018