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Corrosion mechanism of commercial MgO-C refractories in contact with different gas atmospheres
Dalarna University, School of Technology and Business Studies, Materials Technology.
2008 (English)In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 48, no 6, 760-767 p.Article in journal (Refereed) Published
Abstract [en]

Corrosion of MgO-C refractories in different gas atmospheres consisting of air, Ar, CO or Ar/CO was studied in laboratory experiments. In total, 103 experiments were carried out in the temperature range 1 173 to 1 773 K and for holding times between 2 to 120 min. The reaction rate of the MgO-C material was determined from measurements of the weight loss of the samples. The results showed that the refractory weight loss increased with an increased temperature or an increased holding time. The thermodynamic conditions and the experimental results showed that magnesium gas and carbon monoxide gas should form during ladle refining of steel when the refractory material consists of MgO-C. It was suggested that the reaction rate is directly dependent on the oxygen potential in the ambient atmosphere.

Place, publisher, year, edition, pages
2008. Vol. 48, no 6, 760-767 p.
Keyword [en]
MgO-C refractory, oxidation-reduction, gas atmosphere, corrosion rate, corrosion mechanism
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:du-17679DOI: 10.2355/isijinternational.48.760ISI: 000257093300006OAI: oai:DiVA.org:du-17679DiVA: diva2:816644
Available from: 2015-06-03 Created: 2015-06-03 Last updated: 2015-06-03Bibliographically approved

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CiteExportLink to record
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