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The Effect of H-2 and H2O on the Oxidation of 304L-Stainless Steel at 600 A degrees C: General Behaviour (Part I)

Hamed Hoseini Hooshyar (Institutionen för kemi och kemiteknik, Oorganisk miljökemi) ; Torbjörn Jonsson (Institutionen för kemi och kemiteknik, Oorganisk miljökemi) ; J. Hall ; Jan-Erik Svensson (Institutionen för kemi och kemiteknik, Oorganisk miljökemi) ; Lars-Gunnar Johansson (Institutionen för kemi och kemiteknik, Oorganisk miljökemi) ; Jesper Liske (Institutionen för kemi och kemiteknik, Oorganisk miljökemi)
Oxidation of Metals (0030-770X). Vol. 85 (2016), 3-4, p. 321-342.
[Artikel, refereegranskad vetenskaplig]

The effect of p(H2O) and p(H-2) on the oxidation of 304L stainless steel at 600 A degrees C has been investigated in the present study. The samples were analysed by means of X-ray diffraction, Auger spectroscopy, and scanning electron microscopy equipped with energy dispersive spectroscopy. The results showed that at fixed p(H-2), the corrosion rate increased considerably with increasing p(H2O). At fixed p(H2O), the corrosion rate decreased slightly with increasing p(H-2). Duplex oxide scales formed during the exposure in all environments. The outer and inner layer consisted of Fe3O4 and (Fe, Cr)(3)O-4, respectively. The latter was mainly in the form of internal oxidation. The Cr-rich oxide formation was observed at the initial oxidation process before oxide breakdown. The Auger analysis also suggested the presence of Cr-rich oxide layer just after the breakaway oxidation. The results indicated that the rate-determining step in the corrosion attack is surface controlled or diffusion controlled through an oxide layer with fixed thickness over time.

Nyckelord: Stainless steels, High temperature corrosion, Water vapor, Hydrogen, Low oxygen activity environment, high-temperature oxidation, austenitic stainless-steel, water-vapor, steam oxidation, 9-percent-cr steels, breakaway oxidation, 304l, chromium, oxide, corrosion



Denna post skapades 2016-04-29.
CPL Pubid: 235620

 

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Institutioner (Chalmers)

Institutionen för kemi och kemiteknik, Oorganisk miljökemi

Ämnesområden

Materialkemi

Chalmers infrastruktur