High Temperature Oxidation and Corrosion of Spark Plasma Sintered FeCrAlTiy-10 Mass % MoSi2 Coating on Low Carbon Steel

Abstract

In the present study, we prepare the FeCrAlTiy-10 MooSi2 coating on low carbon steel using the spark plasma sintering (SPS) technique. Its resistance against oxidation and corrosion was studies in air and atmosphere containing 20 mass % NaCl at 700C for 8 cycles. The result show that a dense coating layer is composed by FeCr containing Al and MoSi phases. After high temperature oxidations test, a thin protective Al2O3 layer was formed. While mix oxide scales composing of (Cr,Fe)2O3 and Fe3O4 were formed after high temperature corrosion test. Althought, the affected area after corrosion test was more severe than after oxidation test, the coroded sample somehow had a lower mass gain compared to oxidized sample after 8 cycles exposure. This could be related to the effect of chlorine ions and oxide spallation during cyclic corrosion test