Some Aspects of Electrochemistry at Slag/Metal Interfaces
If two in each other immiscible liquids(one of them an ionic solution)come into contact,then segregations at the interface occur and electric potential between both phases is generated.This is the case e.g.when liquid metal comes into contact with liquid slag.Electrocapillary measurements in steel-slag melts were performed in this study.The metal drop weight in the liquid slag method was used for investigation.Using this method the interfacial tension and the potential can be measured simultaneously.Low alloyed steels with high and low S and O activities in contact with slags with different basicities were used for investigations and the effect of electrical potential on the interfacial tension γ was measured.The interfacial tension increases with increasing basicity and decreasing S and O activities independent of applied electrical potential.With lower oxygen and sulphur contents of steel γ increases clearly whereas the zero charge electrical potential Δφ zc does not change.The maximum value of γ,corresponding to Δφ zc,is shifted to more negative electric potential for sour slags compared to the basic slags.The slope of the γ decrease is higher at the negative electric potential differences compared to the positive differences.
electrocapillarity interfacial tension slag-metal interface Lippmann curve
Stefan LACHMANN Piotr R.SCHELLER
Forging Works Gr(o)ditz,vorm.TU Bergakademie Freiberg,Germany Prof.em.Inst.Iron and Steel Technology TU Bergakademie Freiberg,Germany
国际会议
the 6th International Congress on the Science and Technology of Steelmaking,ICS2015(第六届国际炼钢科技大会)
北京
英文
1095-1098
2015-05-12（万方平台首次上网日期，不代表论文的发表时间）