Corrosion Studies in Supercritical CO2


(a) Metallic coupons prepared for<br/>corrosion testing in (b) the ORNL<br/>supercritical CO<sub>2</sub> test system (autoclave/furnace capable of<br/>800°C and 550 bar)
(a) Metallic coupons prepared for
corrosion testing in (b) the ORNL
supercritical CO2 test system (autoclave/furnace capable of
800°C and 550 bar)
Oak Ridge National Laboratory (ORNL)
Website:  Oak Ridge National Laboratory (ORNL)
Award Number:  FWP-FEAA333
Project Duration:  10/01/2014 – 03/31/2016
Total Award Value:  $99,900
DOE Share:  $99,900
Performer Share:  $0
Technology Area:  Advanced Turbines
Key Technology:  Turbo-machinery for Supercritical CO2 Power Cycles
Location:  Oak Ridge, Tennessee

Project Description

The Oak Ridge National Laboratory (ORNL) will support Aerojet Rocketdyne's Office of Fossil Energy project DE-FE0023998, titled "Advanced Turbine Components for Combined Cycle and Supercritical CO2 Power Cycle Applications." Aerojet Rocketdyne will perform conceptual design and analysis for turbomachinery operating in high-pressure, high-temperature carbon dioxide (CO2) environments. Some alloys have shown very good corrosion resistance in this type of environment, but the response appears to be highly dependent on the composition. ORNL's specific contribution is corrosion testing and analysis of candidate alloys in CO2 at 2,900 psig and 750 degrees Celsius to determine materials compatibility and inform future turbomachinery designs. ORNL will expose corrosion samples provided by Aerojet Rocketdyne in two separate tests to evaluate the performance of these alloys under relevant supercritical CO2 conditions. Following each exposure, the effect of the environment on the samples will be assessed using light microscopy, scanning electron microscopy, and electron microprobe analysis.

Project Benefits

ORNL will contribute to the project by conducting corrosion studies using its supercritical CO2 test facility. The information collected from these corrosion studies will provide guidance for the selection of materials for the turbomachinery included in the Aerojet Rocketdyne design.

Contact Information

Federal Project Manager 
Seth Lawson:
Technology Manager 
Richard Dennis:
Principal Investigator 
James Keiser:

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