Elma Elmasonic MF 1000, Руководство по эксплуатации

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Cleaning Process and Cleaning Chemicals
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BA/US/MF/1202 © Elma Schmidbauer GmbH
7 Cleaning Process and Cleaning Chemicals
7.1 Ultrasonic cleaning effect
The ultrasound transducer fitted below the tank bottom
transforms electric energy into mechanic vibrations. The
vibrations are equally transmitted into the cleaning liquid in the
tank. This process creates tiny vacuum bubbles in the liquid,
which implode immediately. This is called cavitation. The
cavitation process allows removal of all kinds of contamination
from those spots where the cleaning liquid can reach.
7.2 Cleaning chemicals
When choosing a cleaning chemical please ensure that the
chemical is suitable for the use in ultrasonic cleaning baths to
prevent damages of the transducer tank. Flammable products
are not allowed (see safety warnings). The chemicals must not
contain halogenide ions or salt, as these may cause crevice
corrosion of the stainless steel. The same applies to acids, such
as hydrochloric acid, sulphuric acid or nitric acid.
ELMA has a wide range of cleaning chemicals on offer
developed and made in our own laboratory. The application of
these chemicals help to prolong the service life of the ultrasonic
unit. Please ask for our brochures.
If other chemicals are used, observe the instructions given on
the label, particularly in connection with the use in ultrasonic
cleaning baths.
Should you use pulverised or granulated cleaning media by
other suppliers, make sure that these media are fully dissolved
in the cleaning liquid. Possible residues of undissolved particles
can cause contact corrosion and lead to pinholes in the tank
bottom.
7.3 Degassing of the liquid
The cleaning results are optimised if the ultrasonic unit is
operated over a period of approx. 15
– 20 minutes before
cleaning, in order do degas the liquid in the bath. Fresh
cleaning liquids are generally saturated with air. Air in the
cleaning liquid, however, has a dampening effect on the
ultrasonic waves and so diminishes the cleaning effect,
particularly if a fresh cleaning liquid is used or after longer idle
periods. The duration of the degassing process depends on
various conditions (e.g. temperature, volume).