THE EFFECTIVENESS OF WAX IN PROTECTION OF BRONZES COVERED WITH ARTIFICIAL PATINA IN OUTDOOR EXPOSURE

Julieta Daniela  CHELARU; Lucian  BARBU-TUDORAN; Liana Maria  MUREŞAN

THE EFFECTIVENESS OF WAX IN PROTECTION OF BRONZES COVERED WITH ARTIFICIAL PATINA IN OUTDOOR EXPOSURE

Authors

Julieta Daniela CHELARU Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj-Napoca, Romania. Email: jdchelaru@chem.ubbcluj.ro. https://orcid.org/0000-0001-5861-5073
Lucian BARBU-TUDORAN Electron Microcopy Center, Faculty of Biology and Geology, Babes-Bolyai University; Integrated Electron Microscopy Laboratory, National Research and Development Institute for Isotopic and Molecular Technologies, Cluj-Napoca, Romania. Email: lucian.barbu@ubbcluj.ro. https://orcid.org/0000-0003-0360-016X
Liana Maria MUREŞAN Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj-Napoca, Romania. Email: limur@chem.ubbcluj.ro. https://orcid.org/0000-0002-2891-2947

Keywords:

bronze, artificial patina, corrosion inhibitor, Carnauba wax

Abstract

Lately there is a major concern about the preservation of artificial patina applied on art objects made of bronze. These studies are important in the restoration and conservation of bronze monuments exposed outdoors. In this context, the present work aims to study the efficiency of wax-based films (WF) on the protection of two artificial patina (brown and golden) in a solution containing Na₂SO₄ and NaHCO₃ (pH 5) simulating acid rain. The protective effect of the artificial patina with/without wax-based films was investigated by electrochemical and non-electrochemical methods. The chemical composition of the golden artificial patina/ Carnauba wax layer was determined by X - ray fluorescence analysis, and the morphology was determined by SEM - EDX cartographies. The results have shown that both artificial patinas exerted an anticorrosion protective effect on bronze and the wax improved even more the corrosion resistance. The protection conferred by the golden artificial patina was significantly improved by using Carnauba wax (Cw) and a corrosion inhibitor (2 - mercapto - 5 acetylamino - 1, 3, 4 - thiadiazole).

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STUDIA UBB CHEMIA, Volume 60 (LX), No. 3, September 2015

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Published

2015-09-30

How to Cite

CHELARU, J. D. ., BARBU-TUDORAN, L. ., & MUREŞAN, L. M. . (2015). THE EFFECTIVENESS OF WAX IN PROTECTION OF BRONZES COVERED WITH ARTIFICIAL PATINA IN OUTDOOR EXPOSURE. Studia Universitatis Babeș-Bolyai Chemia, 60(3), 151–162. Retrieved from https://studia.reviste.ubbcluj.ro/index.php/chemia/article/view/8476