Which equation makes it possible to calculate the forces of attraction between a surface and molecules? Is there any free software that implements such a calculation?
[Clarification 1] Between a surface and molecules there is no chemical reaction, no absorption, adsorption may be but unlikely.
[Clarification 2] Between a surface and molecules of another substance I expect something like adhesion. Such a property is possessed by, for example, honey, clay, glue as well. Undoubtedly some substances may be corrosive in interaction with the surface, but I expect that their being corrosive will be very weakly and appears in a very long time. Thus, I guess, corrosivity can be neglected if to consider not so long time intervals. I suppose that this aspect will allow to simplify a model of this interaction. Another question is how big is a contribution of this aspect into a general force fond? An interesting question is as well how big is a contribution of hydrogen bonds if any?