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The initial effect of KCl deposit on alumina scales characterized by ToF-SIMS and AES
Dalarna University, School of Technology and Business Studies, Material Science. Chalmers University of Technology, Göteborg, Sweden.
Chalmers University of Technology, Göteborg, Sweden.
Dalarna University, School of Technology and Business Studies, Materials Technology.
2013 (English)In: Surface and Interface Analysis, ISSN 0142-2421, E-ISSN 1096-9918, Vol. 45, no 1, 445-448 p.Article in journal (Refereed) Published
Abstract [en]

A FeCrAl alloy was preoxidized to form a protective alumina scale, and the effect of KCl deposits on the alumina scale was investigated while exposed during 1 and 24 h at 600 °C. However, impurity concentrations in the alumina scale change the ion conductivity and hence affect its protective properties. Therefore, Auger electron spectroscopy and time-of-flight secondary ion mass spectrometry were used to characterize the alumina scales and detect traces of K and Cl. The results showed that K and Cl existed as large sharp-edged crystals surrounded by a dendritic network after 1 h. However, after 24 h, those were dissolved, and K together with Cl was detected only in the outer layer of the duplex alumina scale, which was formed during preoxidation.

Place, publisher, year, edition, pages
John Wiley & Sons, 2013. Vol. 45, no 1, 445-448 p.
Keyword [en]
SIMS;AES;FeCrAl;Alumina;KCl;initial oxidation
National Category
Corrosion Engineering
Research subject
Stålformning och ytteknik
Identifiers
URN: urn:nbn:se:du-11559DOI: 10.1002/sia.5081ISI: 000319048700114OAI: oai:DiVA.org:du-11559DiVA: diva2:581028
Available from: 2012-12-28 Created: 2012-12-28 Last updated: 2015-06-26Bibliographically approved

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