BLAST CHILLERS AND FREEZERS
USER MANUAL n° 6CE648137NU
–0818
Page 15
5.2 THE COMMONEST CASES OF CORROSION
Floor cleaning
Cleaning floor tiles (after building work or during normal service) is often carried out with very
aggressive products. If such products are sprayed under pressure without caution, the splashes
beneath appliances cause corrosion of bases and panels.
Even worse the vapours from these products fall onto the equipment and extend the corrosion
to all surfaces unless the area is immediately and forcefully ventilated.
Inappropriate cleaning products (Bleach, acids, soda)
If such products or any others that are not specifically designed for use on stainless steel are
used an irreversible attack occurs on the stainless steel surface
.
Cleaning products applied at too high a temperature
All cleaning products become more aggressive if applied hot or to a hot surface. As a general rule the
temperature
should not exceed 60 °C,
so as not to attack the stainless steel and provoke irreversible
blackening of the surface…
Cleaning products not rinsed off properly
If interior surfaces once cleaned are not thoroughly rinsed in order to eliminate any trace of
cleaning product this residue will in time continue its action and provoke corrosion.
Even worse if such surfaces are heated to over 60°C with such products still on them the
problems mentioned already will inevitably occur.
Stagnation of cleaning products
In the same way any area that can retain cleaning chemicals notably gulleys, drains …must be
rinsed thoroughly and abundantly. (Use a nylon brush and fresh water to strengthen the rinsing
action).
Salt concentration
Salt found in every kitchen is often the cause of pitting in stainless steel. Any spillage should be
cleaned off immediately.
Use in an intensive brined environment
Certain products such as Sauerkraut (acidity) and seafood (presence of salt), and as a general
rule all brines require particular attention. Occasional use should not present problems provided
everything is carefully and systematically cleaned after every operation.
High chlorination levels in water
At times certain water supplies have too high a chlorine content. In such cases it is not rare to
encounter the problems mentioned above.
Cleaning aluminium or aluminium coated accessories
The presence of aluminium-coated sheet in a chlorinated solution considerably increases the
level of attack on stainless steel.
Do not leave aluminium accessories such as trays in the bottom of cabinets. One night is
sufficient to attack the equipment’s surface at the points of contact