Ion Exchange and Interfacial Tension at a Metal-Slag Boundary
Between a liquid metal and slag in contact with each other, there is always ion exchange, the existence of which has been shown experimentally . The method of polarization of a metal in slag by means of alternating current  has been used to determine the rate of this exchange , and it has been shown that iron-base alloys exchange iron ions with the slag , while elements such as silicon and phosphorus participate in the exchange to a much lesser extent. Evidently this is because their binding energy  with the slag is fairly high.
KeywordsInterfacial Tension Ferrous Oxide Sodium Oxide Negative Electrical Charge Na20 Content
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