Laser selectivity on cleaning museologic iron artefacts

Gilberto Pereira; Margarida Pires; Benilde Costa; Fernanda Costa

doi:10.1117/12.738153

26 April 2007 Laser selectivity on cleaning museologic iron artefacts

Gilberto Pereira, Margarida Pires, Benilde Costa, Fernanda Costa

Proceedings Volume 6346, XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; 63461G (2007) https://doi.org/10.1117/12.738153
Event: XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2006, Gmunden, Austria

Abstract

Three distinct techniques were used for the cleaning of Fe alloys objects that present surface corrosion. These objects are presently kept in a museologic space. The techniques used to remove the corrosion were mechanical, chemical (EDTA solution) and LASER (pulsed CO₂ and Nd:YAG - Q-Switch), and their efficiency and selectivity compared. The chemical characterisation of the metallic surface and the evaluation of the cleaning degree of the Fe objects were done by transmission 57Fe Mossbauer spectroscopy. The results of the Mossbauer spectroscopy presented here, together with optical microscope observations of the original and cleaned objects suggest that: - The mechanical process of cleaning does not allow for the total removal of corrosion, reaching easily the substratum and so causing mechanical damage on the object. - The cleaning methods using EDTA in confined environment and high control of the experimental conditions, remove the corrosion products efficiently, without damaging the surface of the object. - The cleaning methods using LASER although not achieving the complete removal of corrosion, showed clear characteristics of selectivity in a given range of operating parameters.

Citation Download Citation

Gilberto Pereira, Margarida Pires, Benilde Costa, and Fernanda Costa "Laser selectivity on cleaning museologic iron artefacts", Proc. SPIE 6346, XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 63461G (26 April 2007); https://doi.org/10.1117/12.738153

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available