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Westfalia Separator
Mineraloil Systems GmbH
27
2058-9001-101
/
0506
1.7 Corrosion
Corrosion can also affect bowl parts made of stainless steel. This corrosion can
be flat-spread or pit- or crack-shaped and merits special attention.
Corrosion on stainless steel bowl material should be examined thoroughly and
documented.
Flat-spread corrosion can usually be measured (reduction of wall thickness)
Pit- or crack-shaped corrosion cannot be measured without the risk of damage.
At the initial stage pit-shaped corrosion is generally caused by chlorine ions.
Depending on the stressing of the part, pit-shaped corrosion can result in crack-
shaped corrosion.
Fig. 43
Possible formation of pit-shaped cor-
rosion.
Such pittings can only be investigated by a materials expert.
In case of crack-shaped corrosion attack with or without superposed flat-spread
and pit-shaped corrosion on main bowl components,
the machine must be
shut down immediately
.
Contact your nearest Westfalia Separator representative for a thorough exami-
nation.
Fig. 44
Pittings
Pittings which are close together or
form a linear pattern can signify crack
formation beneath the surface.
Such pittings should be investigated
by a materials expert.
Summary of Contents for OSD 6-91-067
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