Activity of the Carbon and the Oxygen in Molten Iron-Nickel and Iron-Chromium Alloys

Abstract

The equilibrinm of CO-CO₂ gas mixture with the carbon and the oxygen in molten ironnickel and iron-chromium alloys was studied in the range of 0-100% Ni and 0-30% Cr at 1560°C, and following experimental results were obtained:
1. The relationships between the activity coefficients of the carbon or the oxygen and dissolved elements are expressed by the following equations.
∂logf ^(Ni) _C/∂%Ni=0·011……<70%Ni
∂logf ^(Cr) _C/∂%Cr=-0·033……<25%Cr
∂logf ^(Ni) _o/∂%Ni=0·005……<60%Ni
2. The prodnct of the carbon and the oxygen in molten iron is decreased by addition of nickel, while it is increased by addition of chromium.