Abstract
In this review, the latest developments in the scientific understanding of surfaces are presented. Because of the importance of chemical adsorption in a large number of processes of metallurgical interest, several aspects of this phenomenon are reviewed: the kinetic, the thermodynamic, and the structural. In particular, those observations are considered which allow one to establish a close relationship between the initial reactivity of a surface and its structure at an atomic level. Finally, in order to understand phenomena relating to intergranular segregation, the interest in the possibility of applying to internal interfaces the concepts developed during studtes of adsorption on free surfaces is emphasized.
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