Types of wear include: adhesive, abrasive, surface, fretting, erosive or corrosion effects.
Wear is related to interactions between surfaces.
Specifically, wear leads to the removal and deformation of material on a surface as a result of mechanical action.
Wear of metals occurs through the displacement of surface and near-surface material.
This leads to the detachment of particles that form wear debris during contact with other metals, nonmetallic solids, flowing liquids, or solid particles or liquid droplets from flowing gasses.
Wear can also be defined as a process of interaction between two bounding faces of solids within a working environment.
Wear results in dimensional loss of one solid, with or without any actual decoupling and loss of material.
Exposure to the elements affects wear and includes unidirectional sliding, reciprocating, rolling, impact, speed, temperature, as well as counter-bodies such as solid, liquid or gas contact.