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Microstructure and spatial distribution of corrosion products anodically grown on zinc in chloride solutions
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. (Institut de la Corrosion)
Zurich University of Applied Sciences, Germany.
Université de Bretagne Occidentale, France.
Université de Bretagne Occidentale, France.
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2017 (English)In: Electrochemistry communications, ISSN 1388-2481, E-ISSN 1873-1902, Vol. 81, p. 56-60Article in journal (Refereed) Published
Abstract [en]

Zinc substrates were electrochemically oxidized in NaCl solution to produce corrosion patinas. XRD, XPS and Raman analyses enabled the identification of simonkolleite and zinc oxide as the patina constituents. FIB-SEM imaging shows that the upper part of the patinas is a network of simonkolleite nanosheets with an open microstructure that is unlikely to act as a significant barrier for corrosion processes. STEM investigations and Raman mapping measurements reveal the presence of a ca. 20–400 nm thin nanoporous ZnO-rich film below the simonkolleite and covering the zinc substrate. Under potentiostatic conditions, the reduced cathodic activity of the patina-covered zinc electrodes is assigned to this nanoporous ZnO layer. 

Place, publisher, year, edition, pages
Elsevier Inc. , 2017. Vol. 81, p. 56-60
Keywords [en]
Corrosion, Microstructure, Simonkolleite, Zinc oxide, Electrodes, Substrates, Zinc, Cathodic activity, Chloride solutions, Corrosion process, Corrosion products, Potentiostatic conditions, Raman mapping measurements, Zinc electrodes, Zinc chloride
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-40500DOI: 10.1016/j.elecom.2017.06.004Scopus ID: 2-s2.0-85020269404OAI: oai:DiVA.org:ri-40500DiVA, id: diva2:1359871
Available from: 2019-10-10 Created: 2019-10-10 Last updated: 2019-10-10Bibliographically approved

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