Oxidation of Metallic Materials in Simulated CO2/H2O-Rich Service Environments Relevant to an Oxyfuel Plant

W.Joe Quadakkers; T. Olszewski; J. Piron-Abellan; Vladimir Shemet; Lorenz Singheiser

doi:10.4028/www.scientific.net/MSF.696.194

Paper Titles

Mechanical Adhesion and Pickling Behaviour of Thermal Oxide Scales on Hot-Rolled Low Carbon Steel Strips Produced by Different Finishing Temperatures
p.170

Determination of the Epitaxial Strains of a Thermally Grown Oxide on a Metallic Substrate
p.176

Suppression of Surface Hot Shortness Caused by Copper during Hot Rolling
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Effect of Oxidation Temperature to Descaling Properties of the Scale Formed on Silicon Containing Steel
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Oxidation of Metallic Materials in Simulated CO₂/H₂O-Rich Service Environments Relevant to an Oxyfuel Plant
p.194

Water Vapour Effects on the Oxidation of Chromia-Forming Alloys
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Fireside Corrosion of Austenitic Tube Materials for Advanced USC Boilers
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Superheater Fireside Corrosion Mechanisms of SA192 and AISI 316L in WtE Environment: Lab-Scale and Industrial Results
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Detailed Studies on the High Temperature Corrosion Reactions between Potassium Chloride and Metallic Chromium
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HomeMaterials Science ForumMaterials Science Forum Vol. 696Oxidation of Metallic Materials in Simulated...

Oxidation of Metallic Materials in Simulated CO₂/H₂O-Rich Service Environments Relevant to an Oxyfuel Plant

Abstract:

In the present study the oxidation behaviour of a number of candidate alloys for heat exchanging components was investigated in model gas mixtures containing high amounts of CO₂ and/or water vapour in the temperature range 550-700°C up to exposure times of 1000 h. During exposure in Ar/CO₂ and Ar/CO₂/H₂O base gas mixtures at 550-650°C the oxidation rates and scale compositions of martensitic 9-12%Cr steels were similar to those previously observed in steam environments. Thin and protective Cr-rich oxide scales which are commonly found during air oxidation was observed locally on the specimens surfaces after oxidation in Ar-(1-3%)O₂-CO₂. The tendency for protective chromia base scale formation increased when 3% oxygen was added, especially for the 12%Cr steel. When iron base oxide scales were formed on the metal surface, the martensitic steels tended to exhibit carburisation whereby the extent was reduced by increasing the water vapour and oxygen contents. All three studied austenitic alloys exhibited very slow scale growth rates at 550°C, however, at and above 600°C the steels with lower Cr content started to form two-layered iron rich surface oxide scales whereby the outer oxide was prone to spallation upon thermal cycling. The high-Cr austenitic steel 310N and the nickel base alloy 617 formed very thin, Cr-rich oxide scales at all used test temperatures and atmospheres. For those two materials the oxidation behaviour in gases containing water vapour in combination with intentionally added oxygen was affected by formation of volatile chromium oxyhydroxide.

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Periodical:

Materials Science Forum (Volume 696)

Pages:

194-199

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.696.194

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Online since:

September 2011

Authors:

W.Joe Quadakkers, T. Olszewski, J. Piron-Abellan, Vladimir Shemet, Lorenz Singheiser

Keywords:

Chromia, Oxyfuel, Spallation, Volatile Chromium Oxyhydroxide

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