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Synopsis: The rates of absorption of nitrogen in liquid iron containing surface active elements, such as oxygen .and sulphur, were measured at 1550•Ž and 1600•Ž. The transfer of nitrogen across the gas-metal interface was remarkably disturbed by those surface .active elements, adsorbed on the surface of the metal. It was also recognized that the rates of absorption in those melts were proportional to the partial pressure of nitrogen, when the metal contained more than nearly 0.03% sulphur or oxygen. Furthermore, it was observed that the rates of absorption were inversely proportional to 2/3 power of sulphur (or oxygen) concentration in the bulk Contains higher than 0.03%S (or 0.02%O). These concentrations correspond to the coverage of the surface by sulphur or oxygen nearly as FeS or Fe, calculated by the Gibbs' adsorption equation. It becomes

Studies on the Rate of Absorption of Nitrogen in Liquid Iron Containing Surface Active Elements