Somat SPC-75S, Operation & Service Manual

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CAUTION – CORROSION
In isolated cases, depending on local water supply characteristics and operating
conditions, the mild steel components in the SOMAT

System can be subject to
corrosion.
This condition is generally associated with food service machines. Corrosion may
occur in steel piping, pulping tanks, fittings, and pump parts. Corrosion works very
rapidly and the pitting of metal parts can cause early failure, requiring extensive repairs.
Acid corrosion is caused by low pH level in the system water, but it can be easily
controlled by the addition of commercial grade soda ash. Soda ash is readily available
and costs only a few cents a pound in bulk lots.
Alkaline Corrosion is caused by high pH level in the system water. While damages
done by this condition does not occur as quickly as that of Acid corrosion, neutralizing
agents should be added to the system to help eliminate potential corrosion problems.
The proper pH level of the system water should be maintained at a minimum of 7.0 and
not over 8.5. The pH level can be determined by a simple test using litmus paper
indicators.