In order to combat wear it is necessary to fully understand the mechanical and chemical actions that are taking place. Wear can be defined as “the progressive loss of substance from the operating surface of a body occurring as a result of relative motion of the surface”.

Mechanical and chemical causes can be basically classified as follows:

Mechanical causes of wear:

Abrasion

Erosion

Impact

Cavitations

Pressure

Friction

Chemical causes of wear:

Corrosion

Heat


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