The oxidation behaviour of metals and alloys at high temperatures in atmospheres containing water vapour: A review

Saunders, S. R. J.; Monteiro, Maurício J.; Rizzo, F.

doi:10.1016/j.pmatsci.2007.11.001

Cited by 530 publications

(269 citation statements)

References 148 publications

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“…Similar investigations of high temperature corrosion of austenitic steel AISI 304 L [38], alloy 625 [40], ferritic 10CrMo910 steel [40] and FeCrAl alloy [34] show a decrease in corrosion with an increase in H2O vapour concentration. The densification of the resulting corrosion product or ability of the HCl from reaction (2) to exit from the corrosion system has been suggested to compensate for the observed trend.…”

Section: Effect Of H2o Vapour Concentration In the Flue Gassupporting

confidence: 55%

“…The synergistic/antagonistic behaviour of H2O vapour on high temperature oxidation has been effectively reviewed in the literature [36,38]. It has been suggested that H2O vapour can influence the corrosion process via several mechanisms, for example:…”

Section: Effect Of H2o Vapour Concentration In the Flue Gasmentioning

confidence: 99%

“…Effects of H2O vapour on high temperature corrosion of materials have been widely investigated in the absence of deposits (relevant to steamside oxidation of superheater tubes) [28][29][30][31][32][33][34][35][36][37][38]. Generally the corrosion results in an outward growing magnetite layer and an inward growing Fe-Cr spinel phase.…”

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confidence: 99%

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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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Section: Effect Of H2o Vapour Concentration In the Flue Gassupporting

confidence: 55%

Section: Effect Of H2o Vapour Concentration In the Flue Gasmentioning

confidence: 99%

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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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“…Alternatively, though not mutually exclusive, scale growth at the alloy scale boundary could occur through gas transport of H 2 O via the motion of pore interfaces within the scale as first proposed by Rahmel and Tobolski [5]. The porosity in the lower part of the scale, seen in both alloys, could be a remnant of the original growth of the scale, however, evidence of void uptake into the scale as IN625 undergoes inward scale growth into the void regions, shown in Figure 5(d), suggests a mechanism by which the scale can dissociate on the side furthest from the metal as suggested by the Rahmel-Tobolski mechanism.…”

Section: Discussionmentioning

confidence: 96%

“…Saunders et al concluded that the steam affects multiple aspects of oxide growth including adsorption, dissociation, oxide volatilisation and diffusion of reactants when compared to similar processes in dry conditions and it is these processes that determine the rate of formation, morphology and ultimately the properties of the resulting scale [5].…”

Section: Introductionmentioning

confidence: 99%

Microstructural Analysis of IN617 and IN625 Oxidised in the Presence of Steam for use in Ultra-Supercritical Power Plant

Gorman

Higginson

et al. 2012

Oxid Met

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d.m.gorman@lboro.ac.uk; r.l.higginson@lboro.ac.uk; hailiang.du@power.alstom.com; gordon.mccolvin@power.alstom.com; tony.fry@npl.co.uk; r.c.thomson@lboro.ac.uk; Abstract The nickel based alloys IN617 and IN625 that have been selected for their candidacy in the construction of the hottest regions of the supercritical steam cycle have been oxidised under isothermal conditions at 750°C and atmospheric pressure in atmospheres of 100% steam, 50/50% steam/argon and air for up to 4200 hours. Both alloys developed a thin protective oxide under each condition. Scale thickness measurements using SEM micrographs were performed and showed that exposures in steam exhibited a higher rate of scale formation than exposures in air in both alloys. IN617 developed an extensive internal network of alumina which resulted in the formation of alloy protrusions into the scale altering scale growth kinetics, IN625 also formed alumina to a lesser extent. Voids formed in the matrix below the scale in both alloys in each environment. The extent of alumina formation alters the void morphology which eventually impacts the scale growth rate as inward scale growth occurred into the voids in IN625 but not in IN617.

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Overview of Creep Deformation of Nickel Base Superalloys and Intermetallics

Shah¹

2011

Supplemental Proceedings

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The oxidation behaviour of metals and alloys at high temperatures in atmospheres containing water vapour: A review

Cited by 530 publications

References 148 publications

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

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

Microstructural Analysis of IN617 and IN625 Oxidised in the Presence of Steam for use in Ultra-Supercritical Power Plant

Overview of Creep Deformation of Nickel Base Superalloys and Intermetallics

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