Scav-Ox
Advanced Safety
Calca Solutions' ScavOx® 35% hydrazine prioritizes safer work environments with almost zero worker exposure to fumes.
Convenient Packaging Options
We offer a range of packaging options to suit diverse requirements.
Cost-Effective Treatment
ScavOx® hydrazine comes with a low equivalent weight, does not generate by-products requiring additional treatments, and offers a competitive price point.
Scav-ox Product Information
Most boiler corrosion is due to dissolved oxygen carried into the steam generating system with the feed water. The obvious answer to the problem is to get rid of the oxygen before it can cause damage. In most systems, this is done by both mechanical oxygen removal in deaerators, and by the addition of chemical reducing agents. These agents, which combine rapidly with dissolved oxygen to form harmless reaction products, are known as “oxygen scavengers.”
Scav-Ox® 35% hydrazine solution has proved to be an extremely effective oxygen scavenger. At high boiler temperatures it outperforms sodium sulfite, the other most commonly used oxygen scavenger. Calca Solutions has broadened the scope of hydrazine’s advantages with a 35% hydrazine solution that has been catalyzed to react rapidly with oxygen at low temperatures: Scav-Ox® II (organic catalyst).
Since mechanical features, physical conditions and water treatment chemistry of various steam generating systems vary, Calca Solutions’ line is designed to provide the right product for the right purpose. Most important, the catalyzed product has removed the only significant disadvantage of hydrazine – its slowness, compared with sodium sulfite, in reacting with oxygen at low temperatures.
Advantages of Scav-Ox Hydrazine Solutions
- They form a protective magnetite barrier.
- They can be used throughout the steam-generating unit.
- They don’t decompose to form corrosive products or solids.
- They prevent formation of iron and copper oxide deposits.
- They are compatible with other boiler treatment chemicals.
- They also help control pH and equipment corrosion control.
Oxygen Scavengers FAQ
Oxygen scavengers are chemicals added to boiler feedwater or condensate return to remove residual dissolved oxygen.
Dissolved oxygen can cause extensive corrosion damage at the high temperatures and pressures encountered in utility boilers and must be removed.
They should react rapidly with oxygen, passivate steel surfaces, have some volatility, add no solids, carbon dioxide or organic acids to the water and can be safely handled.
None meets them all completely, but hydrazine offers many advantages.
Yes, hydrazine can be a concern, but modern, closed handling systems offered by Calca Solutions can practically eliminate worker exposure. With good work practices, many hazardous chemicals are routinely handled safely.
Scav-Ox ® hydrazine comes in returnable, stainless steel tote bins. They are completely closed and have dripless, quick connect fittings. Their 180- and 350 gallon size eliminates drum handling and disposal. For smaller applications, EZ Drum™ containers are available. They offer a closed handling system in a 55 gallon size.
Oxygen Scavenger Specifications
| Chemical | Volitile | Contribute Solids | Contribute Co2 | Contribute Organics | Hazardous Material | Flammable / Combustable | Theoretical Dosage |
|---|---|---|---|---|---|---|---|
| Hydrazine | Yes | No | No | No | Yes | No | 1:1 |
| Carbohydrazide | Yes | No | Yes | No | No | No | 1.4:1 |
| Sodium Sulfite | No | Yes | No | No | No | No | 8:1 |
| DEHA | Yes | No | Yes | Yes | Yes | F | 1.2:1 |
| MEKO | Yes | No | Yes | Yes | Yes | C | 5.4:1 |
| Erthorbate | No | No | Yes | Yes | No | No | 11:1 |
| HQ | No | No | Yes | Yes | No | No | 6.9:1 |