As the energy transfer medium in Brayton cycle

Supercritical CO2 enjoys the merits of high efficiency and high stability. However

the coupled oxidation and carburization induced by high-temperature supercritical CO2 cause great threat to the safe operation of the system. Identifying the corrosion features and affecting factors

and selecting suitable construction materials in supercritical CO2 environment play an important role in stable operation of Brayton system. Therefore

this article analyzes the corrosion feature of Supercritical CO2 as coupled oxidation and carburization

elucidates the corrosion effects of different environmental factors (temperature

pressure and environment chemistry)

summarizes the corrosion performance and degradation rate of commonly used Fe-based alloys (ferritic steels

martensitic steels

austenitic steels)

Ni-based alloys and other alloys

and introduces the related corrosion protection methods. The related research aims to provide theoretical foundation and technical guidance for the corrosion protection for the high-temperature supercritical CO2 system.