Abstract
The oxygen dissolved in molten steel has been directly and continuously determined by the electromotiveforce tneasurement of the following reversible cell:
That is, a magnesia crucible, in which the carbon-saturated iron and a graphite rod as a lead are inserted, is dipped directly into a molten steel with unknown oxygen content. In this case, the magnesia article serves as an intermediate electrolyte. Then, an electromotive force between the carbon saturated iron and a molten steel is measured at about 1600°C.
E.M.F. in preliminary experiments shows a good reproducibility and a very sensitive correspondence to the change of oxygn potential of atmosphere. Consequently, the constructed cell is considered as a reversible cell and the possibility of the determination of oxygen by this electrochemical method is recognized by the preliminary experiments.
A conversion chart of e. m. f. (my) to oxygen content determined by vacuum fusion analysis in many iron-carbon alloys was plotted at the vicinity of 1600°C. Furthermore, its application to such experiments as continuous determination of the oxygen with decarburization during the oxygen blowing, deoxidizing power of several elements and so on, was carried out with satisfactory results.
