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CorTrol-IS3000 Fact Sheet

Figure 1: Comparison of CorTrol IS3000 and sodium sulfite reactions with dissolved oxygen.

Figure 2: Comparison of CorTrol IS3000 and sodium sulfite/oxygen reaction rates as a function of pH.

CorTrol™ IS3000

Oxygen Scavenger

  • Controls preboiler and boiler oxygen corrosion
  • Minimizes handling and mixing
  • Catalyzed for fast reaction time

Description and Use

CorTrol™ IS3000 is a chemically stable, liquid, re­fined grade of sodium bisulfite, specially catalyzed to provide almost instantaneous oxygen removal. The product is designed to control oxygen corrosion in industrial water systems. It is approved for use where the FDA regulates boiler feedwater treat­ment. It may not be applied in potable water sys­tems or where USDA regulations apply.

Even with good deaerating heater operation, suffi­cient dissolved oxygen can remain in the feedwater to damage the boiler system. Oxygen in water pro­duces pitting which is particularly severe because of its localized nature. Economizers and feedwater preheaters are particularly susceptible to oxygen attack.

In boilers below 1000 psig (70.3 kg/cm2), sodium sulfite material are the most commonly used oxy­gen control agents for chemical deaeration be­cause of low cost, ease of handling, and nonscaling characteristics. Adding a heavy-metal catalyst to CorTrol IS3000 causes the reaction with oxygen to be greatly accelerated (as shown in Figure 1).

The benefit of a faster reaction rate is obtained at all commonly encountered feedwater and boiler water pH levels (as illustrated in Figure 2).

PFB306EN 0410

Treatment and Feeding Requirements

Feed point – CorTrol IS3000 should be fed to the deaerator drop leg or storage section. It can also be fed to the feedwater line. Do not feed neat product directly to the boiler drum.

Feedrate – Feed CorTrol IS300 continuously based on boiler water or boiler feedwater residual test.

Dilution – CorTrol IS3000 can be fed neat or duluted, condensate, softened makeup water, or good quality feedwater at a minimum rate of 7 parts water per part of product. If a solution tank (day tank) is used, then tank should be made of lined steel or other corrosion-resistant construction. Mild agitation should be provided during dilution only. The day tank should be covered to minimize outside air contact. Do not mix with other boiler treatment chemicals in the same day tank.

Equipment – Feed through a 316 stainless steel (s.s.) nozzle directly to the downcomer or storage section of the deaerator. Liquid exposed pump parts should also be 316 s.s. Valves may be 316 s.s., Carpenter 20, PVC, or Penton-lined. Chemical feedlines should be 316 s.s., fiberglass, polypropylene, PVDC, or epoxy-lined.

This product is suitable for use with PaceSetter™ automated chemical feed control equipment.

General Properties

Physical properties of CorTrol IS3000 are shown on the Material Safety Data Sheet, a copy of which is available on request.

Packaging Information

CorTrol IS3000 is a liquid blend, available in a wide variety of customized containers and delivery methods. Contact your GE representative for de­tails.

Safety Precautions

A Material Safety Data Sheet containing detailed information about this product is available upon request.