|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Temperature Corrosion of Structural Materials
||A New Facility for Comparing Water Treatments in Ultra-supercritical Steam Boilers
||Stephen S. Raiman, Bruce A Pint
|On-Site Speaker (Planned)
||Stephen S. Raiman
Ultra-supercritical (USC) steam plants promise improved economics and reduced emissions though higher thermal efficiency. The higher temperatures, however, create a more corrosive environment for steam-facing structural materials. To mitigate material degradation, oxygen can be added to the coolant water to aid in the formation of a protective scale (oxygenated treatment or OT). Alternately, a reducing environment can be created with addition of hydrazine to decrease the aggressiveness of the coolant water (all-volatile treatment or AVT).
This work reports on the design, testing of a new flowing water loop designed to expose materials to controlled and monitored USC steam environments at temperatures up to 650°C and 4000 psi with controlled additions of ammonia, oxygen, and/or hydrazine. Results showing corrosion of common steam-facing materials are presented to compare how the water treatments affect material degradation in USC boilers.
This work was funded by the Electric Power Research Institute.
||Planned: Supplemental Proceedings volume