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A mechanistic study of stratified patina evolution on Sn-bronze in chloride-rich atmospheres
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Surface and Corrosion Science.ORCID iD: 0000-0002-2510-7766
PSL Univ, Chim ParisTech, CNRS, IRCP, F-75005 Paris, France..
PSL Univ, Chim ParisTech, CNRS, IRCP, F-75005 Paris, France..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Surface and Corrosion Science.ORCID iD: 0000-0003-2206-0082
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2020 (English)In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 166, article id 108477Article in journal (Refereed) Published
Abstract [en]

The complex stratified patina formed on Sn-bronze in chloride-rich atmospheres has been explored through long-term field exposures and short-term laboratory investigations using a multi-analytical approach. The stratified patina is composed of Cu2O- and Cu-2(OH)(3)Cl-rich sublayers intercalated by Sn-oxides, mainly SnO2. The stratification is triggered by events of high chloride deposition, resulting in repeated dissolution and solidification of sublayers, whereby redox reactions between the intermediate products of Sn- and Cu-chlorides play a crucial role. Sn-induced patina stratification is a major reason for enhanced patina flaking on Sn-bronze and its accelerated corrosion rate compared to Cu metal in marine environments.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2020. Vol. 166, article id 108477
Keywords [en]
Bronze, Copper, Tin, AES, Raman spectroscopy, Atmospheric corrosion
National Category
Corrosion Engineering
Identifiers
URN: urn:nbn:se:kth:diva-271732DOI: 10.1016/j.corsci.2020.108477ISI: 000519652300043Scopus ID: 2-s2.0-85078604954OAI: oai:DiVA.org:kth-271732DiVA, id: diva2:1424167
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QC 20200416

Available from: 2020-04-16 Created: 2020-04-16 Last updated: 2020-04-16Bibliographically approved

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Chang, TingruOdnevall Wallinder, IngerLeygraf, Christopher

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