Résumé: Samples of Inconel 600 were isothermally oxidized in a controlled atmosphere with a special mounting at high temperature oxidation. Along with this experimental study, a simulation of thermodynamic behavior of the material in the same oxidation conditions was carried out using the Thermo-Calc code. The thermodynamic modeling is able to predict the phase nature and its distribution in the structure of the surface layer resulting from the corrosion of the material in thermodynamic equilibrium in the absence of mrchanical stress. The results of this simulation are supplemented to results obtained from the analysis by glow discharge spectrometry (GDS) which is performed on the samples tested.