In a boiler system, what is the purpose of maintaining a pH range of 10.5 to 12 in the water?

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Maintaining a pH range of 10.5 to 12 in a boiler system is crucial for preventing corrosion. In this specific pH range, the water chemistry is optimized to create an alkaline environment that protects the metal surfaces of the boiler and associated piping from corrosion. Corrosive substances, such as carbonic acid, can form in water with a low pH, leading to significant degradation of the metal components over time. By keeping the pH elevated, the formation of such corrosive compounds is minimized, thus enhancing the longevity and reliability of the boiler system.

Additionally, an alkaline environment can facilitate the formation of protective layers on the surfaces of the boiler materials, further reducing the risk of corrosion. This is why pH control is a vital aspect of water treatment in boiler systems to ensure safe and efficient operation, as it directly influences the overall health of the system and its components.

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