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Influence of microstructure on the corrosion of archaeological iron observed using 3D synchrotron micro-tomography

Simon, HJ; Cibin, G; Reinhard, C; Liu, Y; Schofield, E; Freestone, IC; (2019) Influence of microstructure on the corrosion of archaeological iron observed using 3D synchrotron micro-tomography. Corrosion Science , 159 , Article 108132. 10.1016/j.corsci.2019.108132. Green open access

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Abstract

A combination of X-ray analytical techniques has been used to study the microstructure and corrosion of a 450-year-old cast-iron cannonball fragment from the Mary Rose shipwreck. Using a 3D approach, it has been shown that akaganeite, β-FeO(OH, Cl), starts to appear ˜1.5 mm below the outer surface of the object, occurring selectively around non-contiguous graphite flakes in the microstructure, with no corrosion in graphite-free regions. This spatial analysis has given a new look inside a 450-year-old system, to see how metallographic features interact with local chemical environments to give complex corrosion products, centuries in the making.

Type: Article
Title: Influence of microstructure on the corrosion of archaeological iron observed using 3D synchrotron micro-tomography
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.corsci.2019.108132
Publisher version: https://doi.org/10.1016/j.corsci.2019.108132
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Tomography, cast iron, graphite, conservation, archaeology, Mary Rose
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL SLASH
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Institute of Archaeology
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Institute of Archaeology > Institute of Archaeology Gordon Square
URI: https://discovery.ucl.ac.uk/id/eprint/10079240
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