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The golden alloy Cu5Zn5Al1Sn: Patina evolution in chloride-containing atmospheres
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science. Univ Sci & Technol Beijing, Natl Ctr Mat Serv Safety, Beijing 100083, Peoples R China.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science.
Univ Sci & Technol Beijing, Natl Ctr Mat Serv Safety, Beijing 100083, Peoples R China..
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science.
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2018 (English)In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 133, p. 190-203Article in journal (Refereed) Published
Abstract [en]

The influence of chloride deposition on the formation, evolution and barrier properties of the patina formed on CuSZn5Al1Sn used for architectural cladding is explored via long-term marine field exposures and laboratory investigations. The presence of Cu2O, ZnO, Al2O3 and SnO2 within the inner part of the patina and intercalation of SnO2, Zn-5(CO3)(2)(OH)(6), Zn6Al2(OH)(16)CO3 center dot 4H(2)O, Zn-5(OH)(8)Cl-2 center dot H2O within its outer part, predominantly composed of Cu-2(OH)(3)Cl, significantly reduce the chloride-induced corrosion compared with Cu metal. The intercalation of zinc-rich corrosion products within the patina and not at the top-surface explain their marginal influence on the runoff process that mainly occurs at the outmost surface.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 133, p. 190-203
Keywords [en]
Cu alloy, Atmospheric corrosion, runoff, Patina evolution, corrosion product characterization
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-226775DOI: 10.1016/j.corsci.2018.01.027ISI: 000429764100018Scopus ID: 2-s2.0-85041138972OAI: oai:DiVA.org:kth-226775DiVA, id: diva2:1203770
Note

QC 20180504

Available from: 2018-05-04 Created: 2018-05-04 Last updated: 2018-06-04Bibliographically approved

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