Model alloy, Fe-20Cr (wt%), was oxidized in two gas mixtures Ar-5H 2 O-(5H 2 ) (vol%) at 850 °C. The alloy formed Cr 2 O 3 scales in both gases. The Cr 2 O 3 scale developed faster in Ar-5H 2 O-5H 2 and contained fine pores, whilst that grown in Ar-5H 2 O was dense. Experiments with inert SiO 2 marker revealed that the Cr 2 O 3 scale growth in Ar-5H 2 O-(5H 2 ) was controlled mainly by outward Cr diffusion. When adjusted for grain boundary diffusion effects, Wagner’s theory was successful in describing the hydrogen effect, provided that the Cr 2 O 3 scales are n -type.
No takes yet. Share an insight, caveat, or question.
Nguyen et al. (2024) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: