Fretting and fretting wear can occur on non-electrical things like bearings, but fretting corrosion is something that is associated more with electrical contacts. Fretting corrosion is the name for a buildup of insulating, oxidized wear debris that can form when there is small amplitude fretting motion between electrical contacts. If you work with automotive terminals, you may have heard folks talking about fretting corrosion. A lot of people know that fretting corrosion isn’t a good thing, but they aren’t sure exactly what it is. Hopefully, the following information will help explain what fretting corrosion is all about.