High Temperature Corrosion Behaviour of some Boiler Steels in Pure Water Vapour

Lépingle, V.; Louis, G.; Petelot, D.; Lefebvre, Bruno; Vaillant, J.C.

doi:10.4028/www.scientific.net/msf.369-372.239

Cited by 24 publications

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“…This is in accordance with Wright and Pint, 15 who concluded that at temperatures above 600-650°C, the steam oxidation rate is closer to linear. It was also confirmed by Lepingle et al 16 that the oxidation of T23 starts to exhibit dependence close to linear above 650°C. Results of the tests in this study show that steam oxidation in a temperature range 600-750°C shows parabolic rate dependence (750°C) and the oxidation rate follows.…”

Section: Discussionsupporting

confidence: 70%

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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Section: Discussionsupporting

confidence: 70%

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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“…In theory between the metal loss/oxide scale thickness ratio equals around 1:2 [18]; however for tests conducted it fluctuates with the exposure conditions, such situation is explained due to the scale exfoliation. At 600°C, however there is no significant differences in the metal loss between these two materials which is explained as a result of relatively slower diffusion [30] and lower impact of the chromium content on oxidation under considered conditions [27,33].…”

Section: Discussionmentioning

confidence: 88%

“…Metal loss of the tested ferritic steels increases with exposure temperature and decreasing chromium content [33]. Under tested conditions the T23 exhibits larger metal loss than T92 that is associated with higher chromium content of T92.…”

Section: Discussionmentioning

confidence: 90%

Analysis of High Temperature Steam Oxidation of Superheater Steels Used in Coal Fired Boilers

Dudziak¹,

Łukaszewicz

Simms

et al. 2015

Oxid Met

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The present work compares the behaviour of four steels: (T23, T92, T347HFG, Super304H) in the temperature range 600-750°C. This study focuses on the analysis of the oxidation kinetics in terms of mass change, metal loss and thickness change of the selected materials. In order to understand the differences in oxidation rates between the selected steels, the impact of chromium and the alloying elements were considered in this work. The obtained results show that the impact of alloying elements differs with exposure conditions and importance of the synergy effect.

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“…Therefore, the increase of temperature in steam environment imparts a significantly increased to oxidation rates at 700°C due to the water vapour content. (Aguero et al, 2013;Lepingle et al,2001) The results demonstrated that the dry condition sample had a better oxidation resistant than the sample that oxidized in steam condition. Therefore, the presence of the water vapour content within the steam environment strongly influenced the oxide scale formation.…”

Section: Resultsmentioning

confidence: 97%

High Temperature Oxidation Behavior of T91 Steel in Dry and Humid Condition

Leong

Alia

Kurniawan

2016

IJOST

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High temperature oxidation behavior of T91 ferritic/martensitic steel was examined over the temperature range of 500 to 700°C in dry and humid environments. The weight gain result revealed that oxidation occurs at all range of temperatures and its rate is accelerated by increasing the temperature. The weight gain of the oxidized steel at 700°C in steam condition was six times bigger than the dry oxidation.. SEM/EDX of the cross-sectional image showed that under dry condition, a protective and steady growth of the chromium oxide (Cr 2 O 3 ) layer was formed on the steel with the thickness of 2.39±0.34 µm. Meanwhile for the humid environment, it is found that the iron oxide layer, which consists of the hematite (Fe 2 O 3 ) and magnetite (Fe 3 O 4 ) was formed as the outer scale, and spinnel as inner scale. This result indicated that the oxidation behavior of T91 steel was affected by its oxidation environment. The existence of water vapor in steam condition may prevent the formation of chromium oxide as protective layer.

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High Temperature Corrosion Behaviour of some Boiler Steels in Pure Water Vapour

Cited by 24 publications

References 0 publications

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

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

Analysis of High Temperature Steam Oxidation of Superheater Steels Used in Coal Fired Boilers

High Temperature Oxidation Behavior of T91 Steel in Dry and Humid Condition

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