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Corrosion properties of model zinc-magnesium alloys
Institut de la Corrosion / French Corrosion Institute.
Institut de la Corrosion / French Corrosion Institute.
Högskolan Dalarna, Akademin Industri och samhälle, Materialteknik.
Institut de la Corrosion / French Corrosion Institute.
Visa övriga samt affilieringar
2007 (Engelska)Ingår i: GALVATECH 2007, 2007Konferensbidrag, Publicerat paper (Övrigt vetenskapligt)
Abstract [en]

Recently, superior corrosion properties of novel zinc coatings alloyed with magnesium have been reported.The protection mechanism of magnesium in the coatings was studied on model zinc-magnesium alloys containing from1 to 32 wt. % Mg prepared by casting. Their chemical and phase composition was determined. The samples werecontaminated with NaCl and exposed to wet air. Weight loss was evaluated after 28 days of exposure. The compositionof corrosion products was analyzed using different techniques. The exposure tests were completed with scanning Kelvinprobe measurements. Alloying of zinc with small quantities of magnesium significantly decreased the weight lossof zinc-magnesium alloys. The effect was strongest at 4–8 wt. % Mg in the structure. Weight loss of these alloys was upto 10 times lower than that of zinc. This was found to be connected dominantly to the efficiency of the oxygenreduction, which was significantly limited on the surface of ZnMg phases covered with magnesium-based oxide layers.

Ort, förlag, år, upplaga, sidor
2007.
Nyckelord [en]
Atmospheric corrosion, zinc-magnesium alloys, chloride deposits
Nationell ämneskategori
Bearbetnings-, yt- och fogningsteknik
Forskningsämne
Stålformning och ytteknik
Identifikatorer
URN: urn:nbn:se:du-11554OAI: oai:DiVA.org:du-11554DiVA, id: diva2:581021
Konferens
GALVATECH 2007, Osaka, Japan, 18-22 November 2007
Tillgänglig från: 2012-12-28 Skapad: 2012-12-28 Senast uppdaterad: 2013-01-02Bibliografiskt granskad

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