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Corrosive wear occurs as a result of a
chemical reaction on a wearing surface. The most common form
of corrosion is due to a reaction between the metal and
oxygen (oxidation); however, other chemicals may also
contribute. Corrosion products, usually oxides, have shear
strengths different from those of the wearing surface metals
from which they were formed. The oxides tend to flake away,
resulting in the pitting of' wearing surfaces. Ball and
roller bearings depend on extremely smooth surfaces to
reduce frictional effects. Corrosive pitting is especially
detrimental to these bearings.
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