Menu
Search
Filters
Close
Menu

Save 20% on select titles with code HIDDEN24 - Shop The Sale Now

09248 Corrosion of 9CrODS Exposed to Supercritical Water

Picture for 09248 Corrosion of 9CrODS Exposed to Supercritical Water
Available for download
Product Number: 51300-09248-SG
ISBN: 09248 2009 CP
Author: Jeremy Bischoff,Todd Allen, Yun Chen and Arthur T. Motta
Publication Date: 2009
Industry: Materials Selection and Design
$0.00
$20.00
$20.00
The oxide layers formed on 9CrODS have been characterized using synchrotron radiation fluorescence and diffraction. This analysis showed a three-layer structure with an outer layer containing only Fe3O4, an inner layer containing a mixture of FeCr2O4 and Fe3O4, and a diffusion layer containing a mixture of metal grains and FeCr2O4 precipitates. A Cr2O3 ribbon formed at the diffusion layer-metal interface on the samples exposed to 600ºC supercritical water for 4 and 6 weeks. Calculations of the oxidation behavior were undertaken to calculate the activation energy and the corrosion rate constant n of power law kinetics. These calculations showed that the oxidation behavior of this alloy could not be described by a power law because the oxide microstructure changed with exposure time and temperature. Additionally, the outward flow of iron was calculated and showed that not enough iron migrates outwards to be able to form the outer layer suggesting that other mechanisms might be at work. Finally, a qualitative description of the oxidation behavior of 9CrODS is displayed showing the importance of the role played by Cr2O3 in the corrosion process.

Key words: corrosion, supercritical water, oxide dispersion strengthened steel, oxidation
The oxide layers formed on 9CrODS have been characterized using synchrotron radiation fluorescence and diffraction. This analysis showed a three-layer structure with an outer layer containing only Fe3O4, an inner layer containing a mixture of FeCr2O4 and Fe3O4, and a diffusion layer containing a mixture of metal grains and FeCr2O4 precipitates. A Cr2O3 ribbon formed at the diffusion layer-metal interface on the samples exposed to 600ºC supercritical water for 4 and 6 weeks. Calculations of the oxidation behavior were undertaken to calculate the activation energy and the corrosion rate constant n of power law kinetics. These calculations showed that the oxidation behavior of this alloy could not be described by a power law because the oxide microstructure changed with exposure time and temperature. Additionally, the outward flow of iron was calculated and showed that not enough iron migrates outwards to be able to form the outer layer suggesting that other mechanisms might be at work. Finally, a qualitative description of the oxidation behavior of 9CrODS is displayed showing the importance of the role played by Cr2O3 in the corrosion process.

Key words: corrosion, supercritical water, oxide dispersion strengthened steel, oxidation
Product tags
Also Purchased
Picture for 09255 Corrosion in Super Critical CO2
Available for download

09255 Corrosion in Super Critical CO2

Product Number: 51300-09255-SG
ISBN: 09255 2009 CP
Author: Feng Gui, Francois Ayello, Narasi Sridhar and Ramgopal Thodla
Publication Date: 2009
$20.00
Picture for 09205 Comparison of Short-Term Aqueous Solution and Test Yard Experiments Involving Corrosion Resist
Available for download

09205 Comparison of Short-Term Aqueous Solution and Test Yard Experiments Involving Corrosion Resistant Reinforcements Undergoing Chloride Exposure

Product Number: 51300-09205-SG
ISBN: 09205 2009 CP
Author: William Hartt
Publication Date: 2009
$20.00
Picture for 09153 Control of Metal Dusting Using Alloy Selection, Coatings and Inhibitors
Available for download

09153 Control of Metal Dusting Using Alloy Selection, Coatings and Inhibitors

Product Number: 51300-09153-SG
ISBN: 09153 2009 CP
Author: Brian Chambers, Rafael J. Rengifo and Dale McIntyre
Publication Date: 2009
$20.00

This study reports the results of laboratory investigations in pressurized high-temperature carbon-rich environments simulating operations in syngas production and root cause failure analysis and laboratory analysis simulations in refinery platformer operations. The results rank a variety of stainless steels and Ni alloys.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support