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Atmospheric corrosion of ZnAlMg coated steel during long term atmospheric weathering at different worldwide exposure sites
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. (Institut de la Corrosion)
RISE - Research Institutes of Sweden, Materials and Production, KIMAB.
voestalpine Stahl GmbH, Austria.
voestalpine Stahl GmbH, Austria.
2019 (English)In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 148, p. 338-354Article in journal (Refereed) Published
Abstract [en]

The atmospheric corrosion of zinc aluminium magnesium (ZnAlMg) coated steel was studied in a worldwide exposure in Europe, East Asia and USA. The mass loss of ZnAlMg coated steel was about 2–3 times lower compared to hot dipped galvanised steel (HDG) after 4 years exposure. The corrosion of ZnAlMg coated steel was highly localised with selective corrosion attacks in the eutectic phases of the coating. Sulfate and chloride containing corrosion products were formed in the corrosion pits while zinc hydroxy carbonate and carbonate containing layered doubly hydroxides (LDH) formed mainly in the outer parts of corrosion attacks.

Place, publisher, year, edition, pages
Elsevier Ltd , 2019. Vol. 148, p. 338-354
Keywords [en]
A. Metal coatings, B. IR-spectroscopy, B. SEM-EDS, B. XRD, C. Atmospheric corrosion, Aluminum alloys, Atmospheric corrosion, Chlorine compounds, Dealloying, Galvanizing, Localized corrosion, Magnesium alloys, Steel corrosion, Sulfur compounds, Ternary alloys, Weathering steel, Zinc alloys, Zinc compounds, Corrosion attack, Corrosion products, Eutectic phasis, Hot-dipped galvanised steel, Hydroxy carbonates, Selective corrosion, SEM-EDS, Zinc aluminiums, Aluminum corrosion
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-38540DOI: 10.1016/j.corsci.2018.12.033Scopus ID: 2-s2.0-85059229945OAI: oai:DiVA.org:ri-38540DiVA, id: diva2:1314303
Available from: 2019-05-08 Created: 2019-05-08 Last updated: 2019-05-08Bibliographically approved

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CiteExportLink to record
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