Abstract
In the present paper it is shown that the diffusion coefficients of carbon in chromium steels at high temperatures can be measured by the use of a chromatograph coupled onto a thermobalance. This method is suitable especially in the case of steels containing higher content of carbon. The values of D's measured in low carbon Fe-C-Cr steels have rather qualitative character. However, all the values of D measured in the present work agree well with the diffusion coefficients D(β_Cⁱ) calculated on the basis of a model of Wagner's type.

Key words
carbon diffusion, Fe-C-Cr steels, oxidation, 1100 °C, O₂ + N atmosphere, chromatograph, thermobalance

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