Abstract
An investigation into the grain boundary corrosion behavior of a FeCrAl-1 Nb alloy at 290 ℃ and 7 MPa deaerated solution comprising lithium hydroxide and boric acid was conducted. After 745 hours of corrosion exposure, observations revealed the existence of voids along grain boundary, and preferential oxidation with the transformation from spinel oxide to amorphous oxide at the grain boundary was detected. 18O corrosion labeling results suggested that the corrosion of the alloy exhibited uniformity within a brief timeframe. Further experiments are necessary to investigate the potential impact of intergranular voids and oxidation on long-term corrosion.
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