What should the pH level be in a steam boiler?

The optimal pH level in a steam boiler should generally be maintained between 10.5 and 11.5. This range is essential for several reasons, primarily related to preventing corrosion and scaling within the boiler system. A higher pH level in water creates an alkaline environment, which helps to passivate the metal surfaces of the boiler and reduces the potential for acidic corrosion.

Maintaining this pH level also limits the solubility of dissolved oxygen and carbon dioxide, which can lead to corrosive environments if not controlled. Additionally, the alkaline conditions help to keep impurities in a non-corrosive form and reduce the tendencies for deposit formation that can occur at lower pH levels.

It's important to note that while options that suggest lower pH ranges are typically safer for some types of water systems, they are not suitable for steam boiler operations, where higher pH levels are required to ensure the longevity and efficiency of the equipment.