A study on the wetting behavior of liquid iron on forsterite, mullite, spinel and quasi-corundum substrates

Corrosion Resistance of Novel Fly Ash-Based Forsterite-Spinel Refractory Ceramics

“…With increased content of spinel in the mixtures (FA-S15, RA-S15, FA-S20 and RA-S20), the corrosion resistance was even better. This was due to the increased content of Al 2 O 3 , which has a low solubility to iron oxide [26,28,29,31].…”

“…The high content of MgO (in forsterite and periclase) in all mixtures also results in very good corrosion resistance to non-ferrous metals such as aluminum and copper due to the excellent oxidation resistance of MgO through solid solution phase formation [29,31]. The aluminum and copper metals that are in contact with MgO-based refractories such as forsterite form a protective oxide layer on the surface of the ceramics (transition zone), which inhibits any further corrosion of the ceramics.…”

“…This also allowed the diffusion of iron into the porous ceramic structure, which is clearly visible in Figure 7d-f. However, due to the low solubility of spinel to iron oxide [29], the increased amount of spinel in the forsterite ceramics (mixtures S15, S20) led to more distinct transition zones between iron and ceramics with larger grains of forsterite-spinel matrix (dark grey) and iron oxide-fayalite (light grey). As a result, the corrosion resistance of forsterite-spinel ceramics to molten iron was negligible, with a depth of penetration of iron into the ceramics of 0-2 mm in reactive alumina-based mixtures.…”

Effect of Al Content in Steel on Interfacial Interaction between Molten Steel and MgO Substrate

“…It was believed that the MgO·Al 2 O 3 (s) generated at the interface was contributed to the increase of contact angle with w [Al] . [ 23 ] The MgO in the MgO·Al 2 O 3 (s) probably originated from the MgO(s) in the substrate or the (MgO) contained in CMS. The EDS of spot 3 in Figure 7c shows that there was a (CaO·SiO 2 ) slag layer mainly composed of CaO and SiO 2 on the MgO·Al 2 O 3 (s) layer.…”

“…[ 19–22 ] To study the corrosion of different refractories by molten iron during ingot casting, Park also measured the contact angle of molten iron on different refractories by means of the sessile drop method at 1823 K under the oxygen partial pressure of ≈ 10 −1 Pa, and analyzed the change of contact angle in combination with interfacial products. [ 23 ] Jeon measured the contact angle between molten iron and different refractories by means of the sessile drop method at 1823 K under high‐purity Ar atmosphere, and studied the corrosion of refractories by molten iron through the relationship between the contact angle and interfacial products. [ 24 ] Their results showed that the wetting and corrosion behaviors of molten iron and refractory were mainly affected by FeO produced from the oxidation of iron.…”