THIOGUARD Costs in contrast to other methods:

THIOGUARD crown spray is the most cost effective corrosion protection for existing concrete sewers.

Chemical Treatment Method Relative total Cost
Hydrogen Peroxide Addition $42
Continuous Caustic Soda Addition $30
Ferric Nitrate Addition $28
Caustic Soda Shock Dosing $24
Oxygen Injection $18
Ferric-Ferrous Chloride Addition $9
Ferrous Chloride $7
THIOGUARD Crown Spray $1

For continuous addition, the amount of THIOGUARD required does not depend on the amount of sulfide in the water. For this reason a single addition rate is well suited to control a wide range of sulfide concentrations.

The chart (below) compares relative chemical costs for a variety of continuous addition options.


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