AES study of the effect of segregated sulfur on the oxidation of an Fe-6at%Si alloy surface

Surface composition modification of high-carbon low-alloy steels oxidized at high temperature in air

“…The increase in sulphur creates a concentration gradient, which causing it to migrate towards the metal core if its concentration exceeds the equilibrium segregation profile. However, because of the high manganese content in the alloys as compared to the sulphur content, most of the sulphur is scavenged in the form of manganese sulphide MnS and only a weak fraction is free in the matrix [62]. MnS particles dissolve during slab re-heating at a temperature of 1623-1673 K (above the solubility temperature of MnS) and precipitate as the temperature decreases during the hot rolling operation.…”