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Marangoni flows and corrosion of refractory walls

1998; Royal Society; Volume: 356; Issue: 1739 Linguagem: Inglês

10.1098/rsta.1998.0206

1471-2962

Kusuhiro Mukai,

Power Transformer Diagnostics and Insulation

Restricted accessMoreSectionsView PDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InRedditEmail Cite this article 1998Marangoni flows and corrosion of refractory wallsPhil. Trans. R. Soc. A.3561015–1026http://doi.org/10.1098/rsta.1998.0206SectionRestricted accessMarangoni flows and corrosion of refractory walls Published:15 April 1998https://doi.org/10.1098/rsta.1998.0206AbstractLocal corrosion of refractory at slag–gas and slag–metal interfaces is caused by active motion of slag film formed by the wettability between the refractory and slag. In the systems of SiO2(s)–(PbO–SiO2) slag and SiO2(s)–Pb(l)–(PbO–SiO2) slag, where dissolved components from refractory into the slag increases the interfacial tension of the slag or slag–metal, continuous washing of the refractory wall with thin fresh slag film supplied from the bulk slag phase by the Marangoni effect causes the local corrosion of refractory above the slag level or below the metal level. When the dissolved component from refractory into the slag reduces interfacial tension, for example, in the system of SiO2(s)–(FetO–SiO2) slag, the local corrosion is induced by the active slag–film motion with alternative formation and disappearance in cyclic mode due to the Marangoni effect, and change in the form of slag film due to the variation of interfacial tension and density of the slag film. Local corrosion of oxide refractories for practical use, containing trough materials, at slag–gas and slag–metal interfaces is classified into the above two types. The Maragoni flow of the slag film is also considered to play an important role in the local corrosion of oxide–graphite refractories such as Al2O3–C and MgO–C at the slag–metal interface during the stage of the oxide phase corrosion in the refractory. Previous ArticleNext Article VIEW FULL TEXT DOWNLOAD PDF FiguresRelatedReferencesDetailsCited by Matsushita T, Belov I, Siafakas D, Jarfors A and Watanabe M (2021) Interfacial phenomena between molten iron and molten slag–Effect of nitrogen on the Marangoni convection, Journal of Materials Science, 10.1007/s10853-020-05730-z, 56:13, (7811-7822), Online publication date: 1-May-2021. Hasegawa I, Koizumi T, Kita K, Suzuki M and Tanaka T (2021) Mechanism for Local Corrosion of Solid B2O3 at Water–Gallium Interface Induced by Branched Flow, MATERIALS TRANSACTIONS, 10.2320/matertrans.MT-M2020275, 62:3, (427-435), Online publication date: 1-Mar-2021. 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Mills Article InformationDOI:https://doi.org/10.1098/rsta.1998.0206Published by:Royal SocietyPrint ISSN:1364-503XOnline ISSN:1471-2962History: Published online15/04/1998Published in print15/04/1998 License: Citations and impact Keywordslocal corrosionslag surfaceiron and steel makingslag–metal interfaceMarangoni flowrefractory