ToF-SIMS and u-Raman measurements on laser cleaned bronze archaeological artefacts

Elisabetta Di Francia, Ruth Lahoz, Delphine Neff, Emma Angelini, Sabrina Grassini

Abstract

In this study, ToF-SIMS and u-Raman analyses have been employed to assess the feasibility of laser treatments as a selective, non invasive cleaning methodology for archaeological metallic artefacts. A Q-switched Yb:YAG fibre laser, operating at 1064 nm, has been used for the cleaning treatments, carried out in air and 18O rich atmosphere on an ancient bronze coin. The preliminary results show that laser cleaning treatment selectively removes the dangerous oxyhydroxy chlorides corrosion products without affecting the cuprite protective patina grown directly in contact with the metallic surface.

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IMEKO-TC4-ARCHAEO-2017-057.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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