In this study, the main aspects found in the literature about refractories corrosion were reviewed, evaluating the feasibility of certain tests and relating them with experimental results. The microstructural properties of magnesia-C and doloma-C post mortem refractories were characterized, evaluating them according to the corrosion mechanism. It was investigated the refractory bricks used as lining of slag line in a steel ladle. The post mortem analysis showed the surface interface of reaction between the corroded and the intact refractory, the phases formed as products of corrosion, the carbon loss and the infiltration of slag in the refractory matrix. Based on this analysis, it is possible to understand the corrosion mechanism. Combining this knowledge with up to operational practice, we can establish criteria for the selection of refractories with longer life. The characterization of a new brick that showed record in its use indicates desirable characteristics in a refractory brick.
refractory; corrosion; steelmaking; microstructure
