MIL-HDBK-1003/7
Selection Factors. See Table 26 for a general guide to avoiding circulating
12.8.2
water troubles. For collateral reading on the problem, see ASHRAE Handbook, Systems
Volume, Corrosion and Water Treatment, and National Association of Corrosion Engineers
(NACE), Cooling Water Treatment Manual.
Table 26
Cooling Water Treatments
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* Water Problem
*
Treatment for Systems
*
*
*
*
Once-through
Open recirculating
*
*
* Scale
*
Polyphosphates
Continuous blowdown.
*
*
pH control.
Polyphosphates.
*
*
Manual cleaning.
pH control.
*
*
Softening.
*
*
*
* Corrosion
Corrosion resistant
Corrosion resistant
*
*
materials.
materials.
*
*
Coatings.
Coatings.
*
*
Corrosion inhibitors.
Corrosion inhibitors.
*
*
pH control.
pH control.
*
*
* Erosion
*
Erosion resistant
Erosion resistant
*
*
materials.
materials.
*
*
Velocity limit.
Velocity limit.
*
*
Removal of abrasives.
Removal of abrasives.
*
*
* Slime and
*
Chlorination.
Continuous blowdown.
* algae
*
Chemicals, algaecides, Chemical algaecides.
*
*
1
and slimicides.
Velocity.
*
*
Manual cleaning.
Manual cleaning.
*
*
* Delignation of
*
None
pH control
* wood
*
*
*
* Fungus rot
*
None
Pretreatment of wood
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1. Biodegradable materials should be used to avoid environmental damage to streams,
rivers, lakes, etc.
166
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