Applications
Corrosion Inhibition
Iron and
Manganese Control
Coagulant Aid
Recommended products:
N® or D™ Sodium
Silicate
Magnesium Sulfate Heptahydrate
How it works: Soluble silicates are used in potable as well
as industrial water for inhibiting corrosion of various
metals—iron, lead, copper, and zinc, among others. Soluble silicates inhibit
corrosion by forming a protective film on metal surfaces that isolates the metal
from further corrosive attack. As alkaline chemicals, moreover, silicates raise
the pH of water and thereby provide the further benefit of decreasing the
water’s corrosivity.
Soluble silicates are used in groundwater systems
to sequester iron and manganese, and thereby prevent colored
water in distribution systems. An economical alternative to removal plants,
silicates also do away with the need for sludge disposal.
Activated
silica can be used as a coagulation aid in the coagulation and
flocculation process to create a heavier floc that settles faster. This
can contribute to lower turbidities and longer filter runs.
Activated silica is made on-site by acidifying and then diluting N sodium
silicate.
Magnesium sulfate can be used in the treatment of water and wastewater to reduce total dissolved solids (TDS).
Recommended literature:
PQ® Soluble Silicates: For Protection of Water Systems from Corrosion
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