is the form of wear resulting from small-amplitude oscillations or vibrations that cause the removal of very finely divided particles from rubbing surfaces (e.g., the vibrations imposed on the wheel bearings of an automobile when transported by rail car, or on the fifth wheel on tractor trailers). With ferrous metals the wear particles oxidize to a reddish, abrasive iron oxide, which has the appearance of rust or corrosion, and is therefore sometimes called fretting corrosion; other terms applied to this phenomenon are false Brinelling (localized fretting involving the rolling elements of a bearing) and friction oxidation. Fretting can be controlled with lubricants containing molybdenum disulfide.