What is sodium sulphite commonly used for in boiler water treatment?

Sodium sulphite is primarily used in boiler water treatment as an oxygen scavenger. In the context of water treatment, oxygen presents a significant problem because it can lead to corrosion of the boiler materials. Sodium sulphite reacts with dissolved oxygen present in the water, effectively neutralizing it and preventing oxidative damage. This reaction helps to improve the overall efficiency and longevity of the boiler system by minimizing corrosion-related issues.

Moreover, sodium sulphite not only helps in maintaining the integrity of the boiler but also contributes to maintaining properly treated water that supports effective steam production. The use of sodium sulphite is especially critical in high-pressure boiler systems, where the potential for corrosion is significantly increased due to high temperatures and pressures.