Behavior of sulfur on high temprature oxidation of Fe-20Cr-4Al alloys.

Abstract

Behavior of sulfur in high temperature oxidation of Fe-20Cr-4A1 alloys with 491, 1300 and 6300ppm of sulfur was studied at 1473K for 18.Oks in 1 bar of oxygen. Mass changes of these alloys after the oxidation were almost the same of 0.60x 10-2kg/m2. The oxide scales with good adhesion on each alloys were analysed as a-A12O3 by XRD analyses. Observation of indentation by hardness measurement suggested that a highly ductile scales were formed on these alloys.