Fretting corrosion occurs where there is friction between two metal surfaces. Generally, this friction is caused by vibrations. The debris formed by fretting corrosion accelerates the damage. initial damage is done by contact welding. Vibrations cause contact welds to break, with subsequent surface deterioration. Debris formed acts to accelerate this form of corrosion by serving as an abrasive. Fretting corrosion is especially prevalent in areas where motion between surfaces is not foreseen. If allowances for vibration are not made during design, fretting corrosion may be a strong candidate.