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

DOI: 10.1016/j.elecom.2008.03.018 DOI Help

Authors: Trevor Rayment (Diamond Light Source) , Alison Davenport (University of Birmingham) , Jean-philippe Tinnes (University of Birmingham) , Richard Wiltshire (University of Birmingham) , Christopher Martin (STFC, Daresbury Laboratory) , Graham Clark (STFC, Daresbury Laboratory) , Andy Dent (Diamond Light Source) , Fred Mosselmans (Diamond Light Source) , Paul Quinn (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Electrochemistry Communications , VOL 10 , PAGES 855 - 858

State: Published (Approved)
Published: February 2008

Abstract: 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. NiCl2 · 6H2O is the main phase in the salt film on nickel, whereas salt films on both iron and 316 L stainless steel are predominantly FeCl2 · 4H2O. 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.

Journal Keywords: Salt Film; Corrosion; Pitting; X-Ray Diffraction; Synchrotron

Subject Areas: Chemistry, Materials


Instruments: I18-Microfocus Spectroscopy