The advantage of using supercritical water (SCW) systems for power generation is based on the increased thermodynamic efficiency when operating at higher temperature and pressure. Steam oxidation has become an important issue for power plants as operating temperatures increase from current to 650°C and even higher. Three alloys, FeCrAlY, NiCrAl, and Sanicro 25, were investigated in an elevated steam oxidation condition. All three materials showed relatively good initial SCW oxidation resistance, but after 100 hr, the oxidation rate of FeCrAlY increased rapidly compared to NiCrAl and Sanicro 25, which both showed a steadier and lower rate of oxide growth and weight gain.
Issue Section:
Research Papers
Topics:
Alloys,
Oxidation,
Steam,
Weight (Mass),
Temperature,
Boiler tubes,
Power stations,
Pressure
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