Influence of SO2 on the Oxidation of 304L Steel in O2 + 40%H2O at 600 °C

Järdnäs, Anders; Svensson, Jan‐Erik; Johansson, Lars‐Gunnar

doi:10.1007/s11085-008-9096-z

Cited by 34 publications

(21 citation statements)

References 16 publications

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“…In contrast, recent studies [22][23][24] have revealed beneficial effects of SO 2 with regard to oxidation rates of iron in certain conditions. The reason for decreased oxidation rates by SO 2 was attributed to the presence of sulphate on the oxide surface of iron [22][23][24]. This effect was postulated to be due to a decreased activity of oxide ions on the hematite surface caused by adsorbed sulphate blocking the surface sites where oxide ions are generated.…”

Section: Effect Of So 2 On Scale Morphologymentioning

confidence: 84%

“…In contrary to that, beneficial effects of SO 2 against oxidation of pure Fe and Fe-base alloys, if present in trace amounts (1-1000 ppm) in the temperature range of 450-650°C, has been recently reported [22][23][24]. The inhibitive effect of SO 2 was attributed to a small amount of sulphate found at the gas/oxide interface of the alloys.…”

Section: Introductionmentioning

confidence: 90%

“…It is well established that the sulphide formation in the oxide scale and in the base alloy is related to molecular transport of sulphur [18-24, 44, 64-66]. It has been suggested by many investigators that sulphur is able to penetrate inside the scales from the bulk atmosphere during oxidation through the diffusion of gaseous species via pores and microchannels in the oxide scales [18][19][20][21][22][23][24][64][65][66]. Huenert and Kranzmann [30] had demonstrated such channels (microcracks) and isolated pores to be present in the oxide scales through which gaseous species may be able to access the oxide/alloy interface.…”

Section: Effect Of So 2 On Scale Morphologymentioning

confidence: 99%

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Comparative Study on High Temperature Oxidation of T92 Steel in Dry and Wet Oxyfuel Environments

et al. 2015

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Fireside oxidation of T92 steel was studied after exposure times up to 1000 h in the temperature range of 580-650°C in simulated dry (CO 2 -27 % N 2 -2 % O 2 -1 % SO 2 ) and wet (CO 2 -20 % H 2 O-7 % N 2 -2 % O 2 -1 % SO 2 ) oxyfuel environments. Water vapour addition to the oxyfuel gas substantially increased the oxidation rate. The oxide scales developed under wet environment contained more defects, resulting in higher access of oxidants to the substrate material and enhanced oxidation. In addition, the oxide scales had lower chromium enrichment in the inner layer as compared to that in the dry condition. The oxide scales consisted of hematite and magnetite in the outer layer and a mixture of (Fe, Cr)-spinel, sulphides and wustite in the inner layer. The sulphur distribution differed between the oxide scales developed in dry and wet oxyfuel environments. Sulphur was mainly concentrated in the inner layer and at the oxide/alloy interface. In contrast to the wet oxyfuel gas, very high sulphur concentration was measured in the inner oxide scale formed in the dry oxyfuel gas. Additionally, Fe-sulphide was formed at the interface of inner and outer oxide layer in the wet condition.

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Section: Effect Of So 2 On Scale Morphologymentioning

confidence: 84%

Section: Introductionmentioning

confidence: 90%

Section: Effect Of So 2 On Scale Morphologymentioning

confidence: 99%

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Comparative Study on High Temperature Oxidation of T92 Steel in Dry and Wet Oxyfuel Environments

et al. 2015

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“…Other studies [11,[22][23][24][25][26][27] suggest that SO2 in the flue gas can affect the corrosion process in a couple of ways:…”

mentioning

confidence: 99%

“…In this process, SO2 is also converted to SO3, (b) formation of surface sulphates which prevent the vaporisation of CrO3(OH)2 and thus, slow down the corrosion process [26,27], and; (c) the ability of surface sulphates to inhibit surface reactions involved in corrosion [27].…”

mentioning

confidence: 99%

Effect of Water Vapor on High-Temperature Corrosion under Conditions Mimicking Biomass Firing

Okoro¹,

Montgomery²,

Frandsen³

et al. 2015

Energy Fuels

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The variable flue gas composition in biomass-fired plants, among other parameters, contributes to the complexity of high-temperature corrosion of materials. Systematic parameter studies are thus necessary to understand the underlying corrosion mechanisms. This paper investigates the effect of water (H 2 O) vapor content in the flue gas on the high-temperature corrosion of austenitic stainless steel (TP 347H FG) under laboratory conditions, to improve the understanding of corrosion mechanisms. Deposit-coated and deposit-free samples were isothermally exposed for 72 h in a synthetic flue gas atmosphere containing either 3 or 13 vol % H 2 O vapor. Comprehensive characterization of the corrosion products was carried out by the complementary use of microscopic, spectroscopic, and diffraction-based techniques. To evaluate the effect of the exposure time, results were compared to previous results with longer isothermal exposure over 168 h and indicated that the development of a Ni-rich layer as a result of selective attack was time-dependent. The increase in the water vapor decreased the measurable corrosion attack, and in addition, decreased sulfation was observed. Results from the current investigation and from previously reported findings suggest that an increase in the water vapor content will cause competitive adsorption on active sites.

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Service conditions and their influence on oxide scale formation on metallic high temperature alloys for application in innovative combustion processes

Teneva-Kosseva¹,

Ackermann

Köhne

et al. 2006

Materials & Corrosion

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The present paper focuses on two aspects: the service conditions of a flame tube in a low-NO x recirculation burner (maximum temperature experienced by the material: 1000 C) and the interrelationship between service conditions and both the structure and growth of the oxide scale. The flame tube is exposed to extreme thermal and atmospheric conditions during service. Due to the short burner operation time followed by a pause, rapid changes of the temperature and gaseous environment occur. Three Ni-based alloys (alloy 602 CA, alloy 603 XL and alloy 693) were investigated in cyclic oxidation tests under typical conditions for the combustion of fuel oil. Flame tube temperature measurements in both the axial and the tangential directions are presented together with results concerning the influence of the fuel quality, duration of the air ventilation after burner shut down and temperature on the thickness and composition of the oxide scale.

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Influence of SO2 on the Oxidation of 304L Steel in O2 + 40%H2O at 600 °C

Abstract: The effect of sulphur dioxide on the oxidation of alloy 304L in O 2

Cited by 34 publications

References 16 publications

Comparative Study on High Temperature Oxidation of T92 Steel in Dry and Wet Oxyfuel Environments

Comparative Study on High Temperature Oxidation of T92 Steel in Dry and Wet Oxyfuel Environments

Effect of Water Vapor on High-Temperature Corrosion under Conditions Mimicking Biomass Firing

Service conditions and their influence on oxide scale formation on metallic high temperature alloys for application in innovative combustion processes

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