Characterization of glass corrosion requires a comprehensive evaluation of the mechanisms by which corrosion can occur. Furthermore, several such mechanisms may be operative during the lifetime of the glass. A variety of surface and solution analytical techniques have been used to achieve a better understanding of the interaction of glass with its environment. The use of at least one surface and one solution analysis technique is essential in any glass corrosion experiment. This is especially important for more complex systems, such as nuclear waste glasses, which may involve complex surface film formation.