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Coil-coated Zn-Mg and Zn-Al-Mg: Effect of climatic parameters on the corrosion at cut edges
RISE, Swerea, KIMAB. (Institut de la Corrosion)
RISE, Swerea, KIMAB. (Institut de la Corrosion)
RISE, Swerea, KIMAB. (Institut de la Corrosion)
RISE, Swerea, KIMAB. (Institut de la Corrosion)
2015 (English)In: Progress in organic coatings, ISSN 0300-9440, E-ISSN 1873-331X, Vol. 83, p. 26-35Article in journal (Refereed) Published
Abstract [en]

We studied the effect of temperature, wet/dry cycling, pH, and the type and concentration of the corrosion activator on cut edge corrosion of painted Zn-15Mg and Zn-1.5Al-1.5Mg coated steel. In most accelerated tests, paint delamination and red rust formation were reduced compared to hot dip galvanised steel (HDG), and Zn-15Mg outperformed Zn-1.5Al-1.5Mg; however, Zn-1.5Al-1.5Mg showed better results when exposed outdoors. The alloyed materials were particularly resistant when HDG was prone to elevated corrosion, i.e. under permanent wetness, at higher temperatures, with high chloride loadings and in the presence of sulphate. Oxygen reduction on steel cut edges was inhibited by the alloying elements.

Place, publisher, year, edition, pages
Elsevier , 2015. Vol. 83, p. 26-35
Keywords [en]
Alloy, Atmospheric corrosion, Metal coatings, Organic coatings, Zinc, Alloying, Alloying elements, Aluminum, Aluminum coatings, Chlorine compounds, Corrosion, Electrolytic reduction, Galvanizing, Zinc alloys, Zinc coatings, Accelerated tests, Climatic parameters, Cut edge corrosion, Effect of temperature, Galvanised steel, Oxygen Reduction, Rust formation, Wet/dry cycling
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Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-40032DOI: 10.1016/j.porgcoat.2015.01.023Scopus ID: 2-s2.0-84924366644OAI: oai:DiVA.org:ri-40032DiVA, id: diva2:1359332
Available from: 2019-10-09 Created: 2019-10-09 Last updated: 2019-10-16Bibliographically approved

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