期刊
SURFACE AND INTERFACE ANALYSIS
卷 46, 期 10-11, 页码 771-775出版社
WILEY
DOI: 10.1002/sia.5502
关键词
metallic artefacts; corrosion; conservation; bronze; polarization curves
A quaternary (Cu-Zn-Sn-Pb) cast bronze was submitted to an electrochemical corrosion experiment using an anodic polarization sweep. The surface/interface chemical analysis of the patina removed after the anodic polarization and the metallographic observations on the corroded bulk alloy highlight the onset of a dezincification process followed by a decuprification process, as well as the formation of a Sn-enriched layer located at the interface patina-bulk alloy. Different local corrosion patterns, as CuCl precipitation in pits, epitaxial growth of corrosion products on dendritic structures and of Cl-enriched oxyhydroxides, are observed too. The results are discussed in comparison with experimental findings obtained in previous ageing tests performed on the same alloy in different chloride-containing solutions. Copyright (C) 2014 John Wiley & Sons, Ltd.
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