Corrosion of several alloys in superheated steam at 482 and 538/sup 0/C

Griess, J.C.; Maxwell, W.A.

doi:10.2172/6533877

Cited by 2 publications

(3 citation statements)

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“…The steam oxidation of Fe-Cr ferritic steels has been studied phenomelogically by many researchers [1][2][3][4][5][6]. Under service conditions, scales exhibit a duplex structure consisting of Fe 3 O 4 as the outer scale and (Fe,Cr) 3 O 4 as the inner scale.…”

Section: Introductionmentioning

confidence: 99%

Formation and disappearance of an internal oxidation zone in the initial stage of the steam oxidation of Fe–9Cr–0.26Si ferritic steel

Ueda

Nanko

Kawamura

et al. 2003

Materials at High Temperatures

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High temperature steam oxidation of the commercial Fe-9mass%Cr-0.26mass%Si steel (ASME T91) was carried out at 973 K, and the formation and disappearance of an IOZ (Internal Oxidation Zone) is discussed based on the microstructure observation by OM, and TEM with EDS. The IOZ formed at the initial stage and disappeared within about 100 ks. Sample oxidized for 61.2 ks showed a continuous IOZ, and TEM observation at the alloy/IOZ interface clarified that a sheet-like amorphous SiO 2 layer formed intermittently. On the sample oxidized for 626.4 ks, the IOZ had disappeared and a sheet of amorphous SiO 2 was located at the alloy/inner scale interface. The inner scale progressively grew next to the SiO 2 layer due to an increase of oxygen potential at the interface because of the extremely low oxygen permeability in the amorphous SiO 2 .Keywords: Fe-9Cr-0.26Si ferritic steel, steam oxidation, internal oxidation zone, amorphous SiO 2 layer 0964-3409/03/03/00035-12

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Section: Introductionmentioning

confidence: 99%

Formation and disappearance of an internal oxidation zone in the initial stage of the steam oxidation of Fe–9Cr–0.26Si ferritic steel

Ueda

Nanko

Kawamura

et al. 2003

Materials at High Temperatures

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“…Some authors report a multilayered inner structure forming as a result of heat flux, 19 the heat flux is reported by Osgerby and Quadakkers 8 to be the major difference between laboratory exposure procedures and plant conditions. Griess et al 23 have shown that even at higher temperatures, in laboratory tests the oxidation rates and scale changes are slower than in exposures where the heat flux is present. However the existence of multilayered oxides may be explained by higher exposure temperatures.…”

Section: Discussionmentioning

confidence: 99%

“…Because the impact of temperature and chemical composition is well known from past research, 1 -24 here, particular attention was paid to the impact of the steel shapes, on steam oxidation resistance in temperature range 600-750°C for 1000 hours. This was done using low-alloyed ferritic steel T23 and medium alloyed austenitic TP347HFG steel.…”

Section: Introductionmentioning

confidence: 99%

Impact specimen geometry on T23 and TP347HFG steels behaviour during steam oxidation at harsh conditions

Dudziak¹,

Łukaszewicz

Simms

et al. 2016

Corrosion Engineering, Science and Technology

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Ferritic T23 steel and austenitic TP347HFG steel have been studied with an emphasis on understanding the impact of specimen geometry on their steam oxidation behaviour. The selected materials were tested over a wide range of temperatures from 600 to 750°C. The tests were carried out in 100% steam conditions for 1000 hours. The tests indicated that the 'curvedshaped' specimens show slower mass gain, scale ticking and void nucleation rates than 'bridge-shaped' specimens (with flat and convex surfaces combined). Furthermore, a bridge TP347HFG sample showed the formation of lower amount of flaky oxide at 750°C.

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Corrosion of several alloys in superheated steam at 482 and 538/sup 0/C

Cited by 2 publications

References 0 publications

Formation and disappearance of an internal oxidation zone in the initial stage of the steam oxidation of Fe–9Cr–0.26Si ferritic steel

Formation and disappearance of an internal oxidation zone in the initial stage of the steam oxidation of Fe–9Cr–0.26Si ferritic steel

Impact specimen geometry on T23 and TP347HFG steels behaviour during steam oxidation at harsh conditions

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