Cleaning media
24
BA/ Transsonic TI-H_GB_0306
© Elma GmbH & Co KG
8.2
Limitations concerning aqueous cleaners
Do not use aqueous cleaning media with pH values in the acid
range (pH value < 7) directly in the ultrasonic tank if fluoride (F),
chloride (Cl) or bromide (Br) ions can be taken in by the
removed dirt or through the cleaning chemical. These can
destroy the stainless-steel tank through crevice corrosion within
a very short period of ultrasonic operation.
Other media which can destroy the stainless-steel tank when
used in high concentrations or with high temperatures during
ultrasonic operation are: nitric acid, sulphuric acid, formic acid,
hydrofluoric acid (even diluted). (List is not guaranteed to be
complete.)
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.
Potassium hydroxide solution can cause stress corrosion
cracking of the ultrasonic tank.
Examples:
Acids and alkaline
solutions
Potassium hydroxide
KOH
•
treatment with hydrochloric acid or hydrofluoric acid, or salts
of acid solutions
•
removal of fluoride, chloride or tetrafluoroborate-containing
fluxing agents from soldered metal items or electronic
components
•
decalcifying of medical systems, which are contaminated
with physiological salt solution, in solution containing citric
acid
•
ultrasound-assisted rinsing of items which have been
etched with hydrofluoric acid or ammonium bifluoride.
The above limitations for the use of chemicals in an ultrasonic
bath also apply for the entering of the mentioned chemicals into
the 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. Please contact your supplier for the
available 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.
The manufacturer cannot be held liable for any damages
caused by non-observance of the limitations mentioned in
sections 8.1 and 8.2!
Entrainment of
chemical substances
Acid-resistant tank
Disinfectants
Safety regulations
Exclusion of liability
