Kinetics of Nitrogen Desorption from Liquid Fe-Cr Alloys under Reduced Pressure

Abstract

The kinetics of nitrogen desorption from liquid Fe-Cr alloys under reduced pressure have been studied at 1600°C.
The nitrogen desorption rate was described by the 2nd order reaction with respect to nitrogen content under these conditions.
The overall nitrogen desorption rate constant, k_ov decreased with the increase in sulfur and chromium contents.
Assuming the mixed control model, the apparent interfacial reaction rate constant, k_[N], is proportional to ƒ_N^1.2ƒ_N^3.2.
The rate of nitrogen desorption seemed to be controlled by the interfacial chemical reaction under the present conditions.