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Fluid Sampling Set - FES
Oil contaminations influence the ageing of the oil
Solid particles
In addition to the enormous damage to hydraulic components from wear caused by
solid particles, the materials of these particles also have an impact on oil aging that
cannot be ignored. Reactions with hydrocarbons and additives, which change the
properties of the oil (saponification, for example), can occur. On the other hand,
metal can act as a catalyst for the oxidation of the hydrocarbon molecules, which
reduces the oil's service life considerably. This occurs especially quickly when
several contaminants act on the oil at the same time.
Air
Under normal conditions, mineral oils always contain a certain percentage of
dissolved air. Unfavourable conditions, e.g. a vacuum, can change the dissolved
state of the air. This released air is responsible for the increased compressibility of
the medium, a higher tendency to cavitation, and, above all, a drastic acceleration of
oil aging.
Water
The aging process of mineral oil accelerates when there is water in the oil, and
when there are particles acting as catalysts the process speeds up. The oil additives
are used up quickly, and the charge of oil becomes unusable in a fraction of the
service life of "dry" oil.
HYDAC Filtertechnik GmbH
Bewa FES 3160266a en.doc
Fluid Sampling Set properties
en
Page 11
2008-05-29
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