- Fretting corrosion results from the oxidation of wear particles that form between two surfaces experiencing small amplitude vibrations under load
- The surfaces will have a reddish brown to black appearance
- For stationary bearing rings the fretting pattern can give an indication of the size of the load zone and the adequacy of the bearing seat
Fretting corrosion is common on loose fit bearing rings and is to some extent unavoidable. The severity of the corrosion varies with application.
- Fretting corrosion on a tight fit ring is an indication of an insufficient fit
Fretting corrosion on the outer diameter of a cylindrical bearing.
Fretting corrosion on the outer diameter of a multi-row tapered bearing. The wear pattern gives an indication of the size of the load zone and the distribution of load among the rows of the bearing. Variations in the fretting pattern give indications of damage present on the housing bore.
Fretting corrosion on a double outer race from a multi-row cylindrical bearing. The wear pattern on the lower portion of the race indicates uneven support resulting from distortion or damage to the housing.