The influence of silicon on the corrosion properties of FeCrAl model alloys in oxidizing environments at 600 °C

• DOI: 10.1016/j.corsci.2018.09.004
• Publication Date: 2018-09-11T16:09:01Z
• Authors: J. Eklund; B. Jönsson; A. Persdotter; J. Liske; J.-E. Svensson; T. Jonsson
• Keywords: 0103 physical sciences; 01 natural sciences

The present study investigates the influence of Si on the high temperature corrosion behaviour of FeCrAl model alloys in O2, O2+H2O and O2+H2O + KCl at 600 °C for up to 168 h. The investigation by SEM/EDX showed that all alloys displayed a protective behaviour in dry O2. In the more corrosive environments (O2+H2O and O2+H2O + KCl) the addition of Si affected the oxidation properties in two ways; Alloys containing Si resisted breakaway oxidation caused by Cr-evaporation (O2+H2O) and the thickness of the oxide formed after breakaway oxidation decreased with increasing amount of Si (O2+H2O + KCl).