Cleaning media
8.2
Limitations on aqueous cleaners
Do not use aqueous cleaning media with pH values in the acid
range (pH < 7) directly in the ultrasonic tank if fluoride (F
ˉ
),
chloride (Cl
ˉ
) or bromide (Br
ˉ
) ions can be taken in by the
removed dirt or through the cleaning chemical. These can
destroy the stainless-steel tank by crevice corrosion within a
very short period of ultrasonic operation.
Other media which can destroy the stainless-steel tanks when
used in high concentrations or with high temperatures during
ultrasonic operation are: nitric acid, sulphuric acid, formic acid,
hydrofluoric acid (even diluted). (Completeness of list not
guaranteed.)
Risk of damage to the unit: do not use cleaning solutions
containing more than 0.5 mass % alkali (KOH and/or NaOH) in
an ultrasonic cleaning tank.
The above limitations for the use of chemicals in an ultrasonic
bath also apply for the aforementioned chemicals when these
are brought into an aqueous (particularly distilled water) bath
through entrainment or from the removed dirt.
For the ultrasonic treatment with the above mentioned media
use an acid-resistant tank (available as accessory equipment).
The limitations of use also apply to the standard cleaners and
disinfectants if these contain the above mentioned compounds.
Observe the safety warnings indicated by the manufacturer of
the chemicals (e.g. goggles, gloves, R and S phrases).
For queries please contact the manufacturer or your supplier.
8.3
List of recommended cleaning media
Elma has a large range of suitable cleaning products on offer
developed by chemical engineers in the Elma laboratory.
Please contact your supplier to find the most suitable cleaning
chemical for your application.
The organic detergents contained in the elma clean cleaning
concentrates are biodegradable. Product informations and
safety data sheets are available from the manufacturer.
Acids and alkaline
solutions
Entrainment of
chemical substances
Acid-resistant tank
Disinfectants
Safety regulations
Environment –
friendly products
© Elma Schmidbauer GmbH
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