|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials in Clean Power Systems IX: Durability of Materials
||Corrosion Behaviour of 9-12Cr Ferritic Steels and 18-25Cr Austenitic Steels in Supercritical CO2
||F. Rouillard, T. Furukawa, B. Duprey
|On-Site Speaker (Planned)
In the framework of the development of Brayton cycle for Sodium Fast Reactor, the French and Japanese Atomic Agencies have launched a collaborative R&D program to investigate the corrosion behaviour of candidate steels in supercritical CO2.
The corrosion behaviour of 9-12Cr and 18-25Cr steels at temperatures between 500 °C and 600 °C under CO2 pressures varying from 1 atm to 250 bar for exposure times up to 8000 h is presented.
18-25Cr austenitic steels shows the higher corrosion resistance.
All studied 9Cr steel grades suffer from fast uniform oxidation and strong carburization whatever CO2 pressure or surface finish. The corrosion behaviour of both 12Cr steel grades studied is not homogeneous and may be influenced by minor elements, surface finish and environmental condition.
The influence of impurities in CO2 on the corrosion behaviour of 9-12Cr steels is evidenced.
A mechanism is proposed to explain the observed corrosion behaviour.
||Planned: A print-only volume