The Influence of Anneal Temperature on the Fe-8Al Plates Anti-Local Corrosive Properties

Abstract

The Fe-8wt. % Al alloy ingot was obtained by melting the pure iron and the pure aluminum together. The plates samples were prepared by cold rolling the ingots with thickness by 80%. The four samples were annealed at 850℃, 900℃, 950℃ and 1000℃ in air and kept for 5min before quenching. The metallographic structure, XRD pattern and local corrosion studies were employed. It is proposed that the sample was entirely re-crystallized and the crystal size was minimized and it varied from 15μm-40μm. The sample was composited by two phases which were FeAl and Fe3Al and no local corrosion was observed after sample was immersed in 5wt. % Na2SO4 12 hours.