Abstract
The anodic behavior of annealed iron-aluminum alloys (3∼20%) was investigated in various concentrations of deaerated sulfuric acid solutions at 30°C by means of a potentiostat. The anodic behavior of Fe-Al alloy is similar to that of Fe-Cr alloy. When sulfuric acid concentration is high, Fe-Al (<12%) alloys have two passivities: The first passivity is due to the formation of ferrous sulphate, and the second one can be considered due to the formation of oxide film. While Fe-Al (20%) has only one passivity, and there is no formation of ferrous sulphate.
