High-temperature oxidation of Fe-Cr alloys in wet oxygen

Influence of water vapour on 316L oxidation at high temperature - in situ X-Ray diffraction

“…Generally, water vapour has a major effect on the growth rate of oxide scales. Increasing the amount of water vapour in the atmosphere reduces the time to the onset of breakaway oxidation [27]. Galerie et al have explained that the breakaway on a Fe-15%Cr alloy was induced by rapid growth of hematite at the metal/chromia interface, at 800-1000 °C, in Ar-15 vol.% H 2 O [23].…”

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“…They can be classified into two main groups. One group concerns the deterioration of the mechanical property of a Cr 2 O 3 scale [5][6][7][8] . That is, invasion of water vapor into the substrate is caused by deterioration of the mechanical property of the Cr 2 O 3 scale accompanying the generation of cracks, which is due to dissolution of hydrogen into the Cr 2 O 3 scale or to an originally brittle property of it.…”

“…Jianian et al 8 investigated the mechanism of breakaway oxidation in Fe-Cr alloys at 1173 K in wet oxygen, and they suggested that microchannels or microcracks in the initially formed Cr 2 O 3 scale enabled [9][10][11][12][13][14][15] . Asteman et al [14][15] reported that evaporation of chromia occurred during oxidation of Type 304L at 873 K in humid oxygen.…”

Corrosion of Carbon Steel with and without Aluminized Coating in (O, S, H)-containing Gases at 500-800℃

“…H 2 S is much more corrosive than SO 2 , because of hydrogen that embrittles the metal and accelerates corrosion rates. Hydrogen transports as H 2 (g) through voids, cavities, and cracks in the scale, and as H atoms by dissolving in the lattice, affecting point defect concentrations [7,8]. It decreases the plasticity of scale and develops voids.…”