What type of corrosion do boiler watersides exposed to the atmosphere commonly experience?

Boiler watersides exposed to the atmosphere commonly experience dissolved oxygen corrosion, which occurs when oxygen from the surrounding air enters the boiler water. This type of corrosion is particularly prevalent in systems where the water is not adequately treated to remove oxygen, making the metal components susceptible to rust and deterioration over time.

When dissolved oxygen is present, it accelerates the corrosion process by reacting with the metal surfaces, leading to pitting and other forms of localized corrosion. This is especially important in steam boilers, where the presence of both water and oxygen can create favorable conditions for corrosion to occur, necessitating regular monitoring and treatment of the boiler water to mitigate these effects.

Understanding this mechanism can help in implementing proper water treatment protocols, including the use of chemicals designed to remove oxygen or prevent its effects on the boiler system, thereby enhancing the longevity and reliability of the equipment.