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Corrosion mechanism of model zinc-magnesium alloys in atmospheric conditions
RISE - Research Institutes of Sweden (2017-2019), Material och produktion, KIMAB. (Institut de la Corrosion)
RISE - Research Institutes of Sweden (2017-2019), Material och produktion, KIMAB. (Institut de la Corrosion)
Dalarna University, Sweden.
RISE - Research Institutes of Sweden (2017-2019), Material och produktion, KIMAB. (Institut de la Corrosion)ORCID-id: 0000-0001-5462-2700
Vise andre og tillknytning
2008 (engelsk)Inngår i: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 50, nr 8, s. 2216-2231Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Recently, superior corrosion properties of zinc coatings alloyed with magnesium have been reported. Corrosion behaviour of model zinc-magnesium alloys was studied to understand better the protective mechanism of magnesium in zinc. Alloys containing from 1 to 32 wt.% magnesium, pure zinc, and pure magnesium were contaminated with sodium chloride and exposed to humid air for 28 days. Composition of corrosion products was analyzed using infrared spectroscopy (FTIR), ion chromatography (IC), and Auger electron spectroscopy (AES). The exposure tests were completed with scanning Kelvin probe (SKP) and electrochemical measurements. Weight loss of ZnMg alloys with 1-16 wt.% magnesium was lower than that of pure zinc. Up to 10-fold drop in weight loss was found for materials with 4-8 wt.% Mg in the structure. The improved corrosion stability of ZnMg alloys was connected to the presence of an Mg-based film adjacent to the metal surface. It ensured stable passivity in chloride environment and limited the efficiency of oxygen reduction.

sted, utgiver, år, opplag, sider
2008. Vol. 50, nr 8, s. 2216-2231
Emneord [en]
A. Zinc, B. IR spectroscopy, C. Atmospheric corrosion, Magnesium, Scanning Kelvin probe, Alloys, Auger electron spectroscopy, Chromatographic analysis, Corrosion, Electrolytic reduction, Electroplating, Fourier transform infrared spectroscopy, Infrared spectroscopy, Ion chromatography, Light metals, Magnesium alloys, Mechanisms, Metallic compounds, Metals, Nonmetals, Oxygen, Photomasks, Protective coatings, Sodium chloride, Spectroscopic analysis, Zinc, Zinc alloys, Zinc plating, Atmospheric conditions, Auger electron spectroscopy (AES), Chloride environment, Corrosion behaviour, Corrosion mechanisms, Corrosion products, Corrosion stability, Electrochemical measurements, Exposure testing, Humid Air, Ion chromatography (IC), Metal surfaces, Oxygen reductions, Pure magnesium, Stable passivity, Superior corrosion, Weight losses, Zinc coatings, Magnesium printing plates, Electrochemistry, Magnesium Compounds
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Identifikatorer
URN: urn:nbn:se:ri:diva-40431DOI: 10.1016/j.corsci.2008.06.008Scopus ID: 2-s2.0-50349098825OAI: oai:DiVA.org:ri-40431DiVA, id: diva2:1361371
Merknad

We gratefully acknowledge the help of members of the project working group: Ari Peltola (Rautaruukki OYJ), Sven-Erik Hörnström (SSAB), Julie Chassagne and Philippe Harlet (ArcelorMittal), Dorothe Koberg (BASF Coatings), Evan Evans (BlueScope Steel), Mónica Zapponi and Juan Pablo Pedraza (Siderar). Jan Stoulil of the Institute of Chemical Technology, Prague is thanked for his help with electrochemical experiments. A part of the study was carried out thanks to the financial contribution from Agence National de la Recherche, France.

Tilgjengelig fra: 2019-10-16 Laget: 2019-10-16 Sist oppdatert: 2023-05-16bibliografisk kontrollert

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