Effect of aluminum on the FeCr(Al) alloy oxidation resistance in steam environment at low temperature (400 °C) and high temperature (1200 °C)
Atharva Chikhalikar, Indranil Roy, Hamdy Abouelella, Rajnikant V. Umretiya, Andrew Hoffman, Mike Larsen, Raúl B. Rebak
Abstract
The effect of aluminum in the FeCr(Al) alloys on the corrosion behavior was studied at two temperatures (400 °C and 1200 °C). For the Fe-21Cr alloy, Cr2O3 layer was formed upon exposure to both temperatures. The addition of Al altered the corrosion mechanism of the alloy. At 1200 °C, a thin α-Al2O3 is formed on the Fe-21Cr-5.5Al alloy. Whereas, at low temperature, a continuous Cr2O3 is formed at the top with an internal Al2O3 layer. These results show that FeCrAl alloys hold promise as Fuel Cladding Materials with Al playing a crucial role under operational as well as accident-like conditions.
Topics & Concepts
AlloyCorrosionHigh-temperature corrosionMaterials scienceCladding (metalworking)MetallurgyAluminium6111 aluminium alloyLayer (electronics)Composite materialNuclear Materials and PropertiesNuclear reactor physics and engineeringFusion materials and technologies