Preventing microcracks

As two surfaces in contact slide off one another, there is a possibility that the contacts created will not separate again at their original interface. The surface disruption that occurs describes the formation of microcracks either on or just below the surface due to cyclical loading and unloading (e.g. ball bearings). Tribo-oxidation occurs if protective layers can be removed in a corrosive environment due to wear. In these cases, the surface is extremely susceptible to corrosion or its progress. 

High thermal conductance or materials that are not compatible with glass can cause microcracks to occur when hot glass is conveyed. These in turn result in rejects further down the production line and an inefficient process.