Comparison of a bio-based corrosion inhibitor versus benzotriazole on corroded copper surfaces

Albini, Monica (University of Neuchâtel, Switzerland) ; Letardi, Paola (National research council, Genoa, Italy) ; Mathys, Lidia (University of Neuchâtel, Switzerland) ; Brambilla, Laura (HE-Arc Conservation-Restauration, HES-SO University of Applied Sciences and arts Western Switzerland) ; Schröter, Julie (HE-Arc Conservation-Restauration, HES-SO University of Applied Sciences and arts Western Switzerland) ; Junier, Pilar (University of Neuchâtel, Switzerland) ; Joseph, Edith (HE-Arc Conservation-Restauration, HES-SO University of Applied Sciences and arts Western Switzerland ; University of Neuchâtel, Neuchâtel (Switzerland))

This research aims to characterize and compare the protective behaviour of a bio-based treatment versus benzotriazole (BTA) for the preservation of copper-based artefacts affected by active corrosion induced by copper chlorides. For this, the treatments were applied on artificial copper hydroxychlorides produced on copper sample. Their inhibition performance was then investigated by Scanning Electron Microscopy, Infrared Spectroscopy and Electrochemical Impedance Spectroscopy. Results showed few BTA-Cu complexes formed and poor protectiveness of the BTA treatments. In contrast, the bio-based treatment resulted in the conversion of almost all copper hydroxychlorides into copper oxalates, providing a more efficient corrosion inhibition.


Mots-clés:
Type d'article:
scientifique
Faculté:
Design et Arts visuels
Ecole:
HE-Arc CR
Institut:
Unité de recherche en Conservation-restauration de la Haute Ecole Arc - UR-ARC CR
Classification:
Conservation - Restauration
Date:
2018-10
Pagination:
84-92
Publié dans:
Corrosion science
DOI:
ISSN:
0010-938X
Le document apparaît dans:



 Notice créée le 2019-04-16, modifiée le 2020-10-27

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