Abstract:
The objective of this work is to study the effects of tin and water vapour on steel oxidation and the adhesion of scales on steel substrate. When the sample was oxidized at 700900 °C in oxygen, it was found that the oxidation kinetics is parabolic. The steel containing 0.06 wt.%Sn has lower oxidation rate than the steel without Sn. XRD results show the formation of FeO, Fe3O4, and Fe2O3 in both steel. For steel with higher Sn content (2.95 wt.%), Snrich phase was observed at the internal interface in the metal side. Its presence might inhibit the outward Fe diffusion for oxidation, thus reducing the steel oxidation rate. For the result of oxidation in water vapour, oxidation rate. For the result of oxidation in water vapour, oxidation rate of the each studied steel oxidized in water vapour containing atmosphere was similar to that oxidized in oxygen. The adhesion test was conducted on the industrial steel: a steel produced from medium and thin slab. It was found that the adhesion energy of the oxide on steel made from a medium slab was higher than that of the oxide on steel made from thin slab. This might be from the presence of impurity particularly Si in the former steel, while the effect of Sn on the adhesion was not observed.