Multi-analytical study of patination methods on steel substrates: a full insight into surface chemistry and morphology |
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Authors: | Email author" target="_blank">H?TéllezEmail author J?M?Vadillo J?J?Laserna R?J?Chater D?S?McPhail |
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Institution: | 1.Department of Materials,Imperial College,London,UK;2.Department of Analytical Chemistry,University of Málaga,Málaga,Spain |
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Abstract: | Patination of metals has been used for decorative or protective purposes, and several methods aimed to create coloured films
on metal surfaces have been developed. This work describes a multi-analytical approach to characterize artificial blue patinas
created on mild steel substrates by means of traditional recipes and methods for colouring ancient objects and artefacts.
We suggest the combined use of secondary ion mass spectrometry, focused ion beam, X-ray diffraction spectroscopy, white light
interferometry and reflectance spectroscopy to characterize blue patinas on steel substrates and to investigate the relationship
between the developed colour and the patina layer microstructure and composition. Therefore, the analysis of the oxide films
produced by either thermal or chemical colouring methods has been successfully performed, providing information about the
film morphology, the surface composition and in-depth elemental distribution within the coloured layers, and the origin of
the colour developed on the surface. |
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