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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