When a boiler is shut down and removed from service, oxygen intrusion occurs as the boiler cools. This dissolved oxygen can cause a rapid pitting attack and metal failure. The potential for oxygen corrosion is particularly high in multiple boiler systems where the boilers are rotated or left off-line for extended periods of time. Unless very high levels of oxygen scavenger are present and the boiler water remains well mixed while off-line, severe corrosion can occur.
Options for Off-line Boiler Protection
There are several options available for protecting an off-line boiler from corrosion:
To learn more about protecting your off-line boilers from corrosion, contact Chem-Aqua today!