Oxidation Behavior

Oxidation diagrams can be calculated with the TCS Metal Oxide Solutions Database (TCOX) at a fixed oxygen partial pressure (Cr-Fe-O) or at a fixed temperature (Fe-Mn-O).

Cr-Fe-O

Cr and Mn are two of the most important alloying elements in steels and their oxidation behavior is important.

Calculated and experimental phase diagram of Cr-Fe-O in air.

Figure 1: Calculated [2008Kje] and experimental phase diagram of Cr-Fe-O in air.

Fe-Mn-O

Calculated and experimental phase diagram of Fe-Mn-O at 1000 °C.

Figure 2: Phase diagram of Fe-Mn-O at 1000 °C, both calculated [2010Kje] and experimental.

References

[2008Kje] L. Kjellqvist, M. Selleby, B. Sundman, Thermodynamic modelling of the Cr–Fe–Ni–O system. Calphad. 32, 577–592 (2008).

[2010Kje] L. Kjellqvist, M. Selleby, Thermodynamic Assessment of the Fe-Mn-O System. J. Phase Equilibria Diffus. 31, 113–134 (2010).