Page 229 - Corrosion Engineering Principles and Practice

204 C h a p t e r 6 R e c o g n i z i n g t h e F o r m s o f C o r r o s i o n 205

(c)
FIGURE 6.49 (continued)

this damage, typically found in machinery, bolted assemblies, and
ball or roller bearings. Contact surfaces exposed to vibration during
transportation are exposed to the risk of fretting corrosion.
Damage can occur at the interface of two highly loaded surfaces
which are not designed to move against each other. The most common
type of fretting is caused by vibration. The protective film on the
metal surfaces is removed by the rubbing action and exposes fresh,

FIGURE 6.50 Fretting corrosion at the interface of two highly loaded surfaces
which are not designed to move against each other. (Courtesy of Pacific
Corrosion Control Corp)