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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium High Temperature Corrosion of Structural Materials
Presentation Title Evaluating the Influence of CO2 Purity on the Corrosion of Structural Alloys for Supercritical CO2 Power Cycles
Author(s) Matthew Walker, Elizabeth Withey, Alan Kruizenga
On-Site Speaker (Planned) Matthew Walker
Abstract Scope Structural alloy corrosion is a major concern for the design and operation of Supercritical CO2 power cycles. A critical shortcoming is that nearly all of the available alloy corrosion data was performed using high purity CO2 (research grade - 99.999% purity), while a commercial scale system is likely to use industrial grade CO2 with higher impurity concentrations (~99.5% purity). Furthermore, experimental investigations have been predominantly focused on characterizing surface oxidation, and have often neglected to examine samples for internal carburization. An experimental program was recently established to address these shortcomings. Results will be presented from a series of 1000 hour CO2 exposure experiments using both research purity and industrial purity CO2 at two temperatures relevant to Sodium Fast Reactor energy conversion systems (350oC and 600oC). The set of eight different structural alloys included in these experiments were characterized for surface oxide microstructure, internal carburization, and corrosion rate / lifetime predictions.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

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A New Facility for Comparing Water Treatments in Ultra-supercritical Steam Boilers
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Cyclic Oxidation Resistance of Chromia Forming Alloys in a Flowing High Temperature Exhaust Gas Environment
Effect of Near Service Environmental Conditions on the High Temperature Damage Behavior of an Intermetallic TiAl Alloy
Effect of Titanium Addition on Microstructure and Oxidation Behaviour of Nb-Si-Mo Alloys at 1300˚C
Effects of CO2 on Fatigue and Creep Properties of the Ni-base Alloy 282
Electroless Ni-plating in Combination with Diffusion Coatings for Corrosion Protection of Steels for SO2 and Cl-rich High Temperature Environments
Evaluating the Influence of CO2 Purity on the Corrosion of Structural Alloys for Supercritical CO2 Power Cycles
Evaluation of Hot Corrosion Resistance of Marine Alloys under Burner Rig Test Using Advanced Characterization Techniques
Evaluation of Type I Hot Corrosion of Marinized Materials through Low Velocity Burner Rig Testing
Evolution of Thermally Grown Oxides in Novel Co-based γ-γ’Superalloys
High Temperature Degradation Mechanisms of Ceramic Matrix Composites: BN Effects
Hot Corrosion Degradation of Turbine Materials Subject to Mixed-mode Exposures and Complex Corrosion Environments
Hot Corrosion of Alloy 617 OCC in Simulated USC Power Plant Environment
J-10: Role of Titanium on the Oxidation of Ni-based Superalloys
J-11: The Effect of Corrosion Damage on the High Temperature Fatigue Behaviour of a Ni-alloy for Disc Rotor Applications
J-2: An Analysis of Oxidation Mechanisms and their Influence on the Life of a Nickel-based Superalloy
J-3: Effects of Boron and Copper on Pitting Corrosion of 9Cr-1Mo Weld Metal
J-4: Flame Resistance and YSZ and Pack Cementation Coated Steel
J-5: Great Performance of Nanostructured Multilayers (Ti-Cr-N) on P92 Steel for High Oxidation Temperature
J-6: High-temperature Coatings for Protection of Steels in Contact with a Novel Molten Salt under Static and Flow-accelerated Conditions for CSP Applications
J-7: Investigating Intergranular Corrosion of Stainless Steel Using Hard X-ray Nanoprobe
J-8: Oxidation in Pure Steam Atmosphere at High Temperature of Protective Coatings: Influence of Pressure and the Architecture
J-9: Oxide Performance of Alumina Forming Alloys for Coking Environments
Kinetics of Pack-aluminized Coating Layer on Ti-6Al-4V Alloys and Oxidation Behaviors of the Coated Alloy
Long-term Behavior of Structural Alloys in Supercritical CO2 at 750C
Mechanism of High Temperature Corrosion of Steel by Naphthenic Acids and Sulfidation
New Insights on Deposit-induced Hot Corrosion
Outward Diffusion through Protective Alumina on NiAl-alloys
Oxidation Mechanism of NiAl-Mo Alloys: Insights from a Cellular Automaton Approach
Oxidation of Transient Liquid Phase Bonded Ni Alloys in High-temperature CO2
Oxidation Resistance of AlN Modified ZrB2 -SiC Ultra High Temperature Ceramics
Oxidation Resistance of FeCrAl Alloys in Air and Steam from 800 to 1300C
Oxide Scale Formation on Cast Ni-base Superalloys in High pO2-environments: Effect of Alloying Additions and Presence of Water Vapor in the Test Gas
Protection of Ti Based Materials Against High Temperature Oxidation by the Fluorine Effect
Stability of Protective Oxide Scales Formed on Pure Titanium with Silicon-bearing Films
Studies on Isothermal and Cyclic Oxidation Behavior of Titanium Aluminide Coating Developed by Laser Cladding
The Effect of Titanium Additions on the Oxidation Properties of Ni-Cr-Al Ternary Alloys
The Influence of External Stress on High Temperature Hydrogen Attack (HTHA) Cracking
The Interaction between Applied Stress and Oxidation in a Coarse Grain Ni-based Superalloy at Temperatures above 700 C
Thermocouples in Gas Turbines: The Oxidation of Materials for Sensors in Thermal Cyclic Conditions

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