Oxidation and carburizing of FBR structural materials in carbon dioxide

摘要

A key problem in the application of a supercritical CO2 turbine cycle to a fast breeder reactor is the corrosion of structural materials brought about by supercritical CO2 at high temperatures. In this study, metallurgical analysis of the ferritic-martensitic steels (12Cr-steel and T91) exposed at 400-600 degrees C for up to 8000 h in supercritical CO2 pressurized at 20 MPa and at 550 degrees C for up to 5000 h in CO2 gas at atmospheric pressure has been carried out.