Аннотация:Quantitative assessment was made after oxidation in N2O4 dissociation products at 800-1400K. Distribution of chromium in the alloy zone, adjacent to the scale, and near the grain boundaries at different distances from the scale was investigated by X-ray electron probe microanalysis. The authors have obtained temperature dependence for chromium volume diffusion coefficient in the temperature range 940-1400 K and grain boundaries diffusion parameter.