Chemical processes and technology
45
Soiling
Problem
How to resolve it
The following substances can cause
corrosion to stainless steel in the wash
cabinet and the accessories:
- hydrochloric acid
- other substances containing chlorides,
such as sodium chloride
- concentrated sulfuric acid
- chromic acid
- particles of iron and shavings
- Thoroughly rinse items in water
beforehand.
- Put the drip-dry items to be washed into
the mobile units, baskets, modules, and
inserts and start a reprocessing program
as soon as possible after placing in the
wash cabinet.
Reaction between process chemicals and soiling
Problem
How to resolve it
Natural oils and fats can be emulsified with
alkaline process chemicals. This can lead to
a heavy build-up of foam.
- Use the
Oil program
.
- Use a special program that dispenses
cleaning detergents containing
surfactants (pH neutral) in the pre-rinse.
- Depending on the application, use de-
foaming agents that do not contain
silicone oils.
Soiling containing high protein levels, such
as blood, can cause a heavy build-up of
foam when processed with alkaline process
chemicals.
- Select a cleaning program with at least
one short pre-rinse in cold water.
Non-precious metals such as aluminum,
magnesium, and zinc can release hydrogen
when processed with very acidic or alkaline
process chemicals (oxyhydrogen reaction).
- Please observe the process chemical
manufacturer’s instructions.
