Oxidation of ferritic steels dispersion strengthened with TiO2 and Y^sub 2^O3 oxides in lead melt

We study the structure and composition of scales formed during the contact of Fe-13Cr-2Motype ferritic steels hardened with oxides TiO2 and Y2O3 with oxygen-containing (10-3 mass% O) lead melt at 550°C for 1000 h. It is established that a Fe3 O4 - Fe (Fe1 - x, Crx)2 O4 two-layer scale forms. Its upper layer (Fe3 O4) grows in the direction of the melt, and the internal layer (Fe (Fe1 - x, Crx)2 O4) grows in the direction to the matrix. Oxide particles favor an increase in the porosity of the internal sublayer of the scale.