What chemicals are commonly used in boiler water treatment?

The use of oxygen scavengers and alkalinity boosters in boiler water treatment is essential for preventing both corrosion and scaling within the boiler system. Oxygen scavengers, such as sodium sulfite or hydrazine, help remove dissolved oxygen from the boiler water, which is a key contributor to corrosion of metal surfaces. By eliminating oxygen, the risk of rusting and pitting in the boiler components is significantly reduced.

Alkalinity boosters, such as sodium hydroxide or sodium bicarbonate, are employed to raise the pH of the water. This alkalinity is crucial as it helps to form a protective layer on the metal surfaces, thereby minimizing the risk of corrosion further. Additionally, maintaining proper alkalinity levels improves the water quality, promoting optimal heat transfer and reducing the potential for scaling due to mineral deposits.

In summary, the combination of oxygen scavengers and alkalinity boosters is vital for ensuring the longevity and efficient operation of boiler systems by addressing the challenges of corrosion and scaling.