ARTICLE
E. Internally Generated contaminations during operation are
due to following types of wears:
Abrasive Wear – Hard particles
bridging two moving surfaces,
scraping one or bothsurfaces.
Aeration Wear – Air bubbles in the
fluid implode breaking away surface material.
Adhesive Wear – Loss of oil film allows metal to metal
contact between moving surfaces.
Cavitation Wear – Restricted inlet flow to pump causes
fluid voids that implode causing shocks that breakaway
critical surface material.
Corrosive Wear – Water contamination in the oil causes
rust that degrades the surfaces.
Erosive Wear – Fine particles in a high-
speed stream of fluid eat away metering
edgesand the critical surfaces.
Fatigue Wear – Particles bridging a clearance cause a
surface stress riser or micro-crack that expands into a spall
due to repeated stressing of the damaged area.
Proper Treatment of Contaminated Oils and
Lubricants
The Oils and Lubricants that may have been contaminated
due to ignorance or unforeseen conditions and may have lost
some of their properties and may have become unfit for use,
should be properly identified and recorded for the suitable
action, including proper testing, cleaning and purification.
The oils and lubricants might have lost the additives and
their properties due to Oxidation, as the contaminations act
as catalyst for the oxidation which damages the important
properties of the specific Oils and lubricants.
It has also to be ensured that any oil should never be mixed
with the different grade and brand of oil or the degrad