OPTICAL EVALUATION OF CORROSION PRODUCTS USING COLORIMETRIC SPECTROSCOPY

1 MAJTÁS Dušan
Co-authors:
2 FIALOVÁ Pavlína
Institutions:
1 The Czech Academy of Sciences, Institute of Theoretical and Applied Mechanics, Praha, Czech Republic, EU, majtas@itam.cas.cz
2 SVUOM ltd., Praha, Czech Republic, EU
Conference:
28th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 22nd - 24th 2019
Proceedings:
Proceedings 28th International Conference on Metallurgy and Materials
Pages:
1607-1614
ISBN:
978-80-87294-92-5
ISSN:
2694-9296
Published:
4th November 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
30 views / 14 downloads
Abstract

Aim of this work is to test possibility to utilize colorimetric spectroscopy for monitoring the corrosion of lead and tin-lead alloys. And furthermore method suitability for preliminary corrosion evaluation of cultural heritage objects. According to literature colorimetry is used to monitor patinas of bronze objects, thus the method might be also suitable for lead based alloys. Samples used were made from commercially produced lead plate. These were exposed in the climatic chamber to different relative humidity (60, 80, 90 %). After the exposure the corrosion products with different color formed on sample surface. These corrosion products were evaluated by different methods: optical microscopy, colorimetric spectroscopy, and X-ray chemical analysis. Collected colorimetric data display difference between treatments suitable for patina evolution monitoring. The paper presents obtained results and comparison of applied methods.

Keywords: Corrosion, lead, cultural heritage, laboratory simulation, colorimetry, spectroscopy, optical method
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