How is Steam Condensate Corrosion Prevented?
The general approach may involve removing oxygen from the feed-water mechanically and chemically, and providing pretreatment of the make-up water to minimize potential carbon dioxide formation in the boiler. In addition, an effective chemi-cal treatment programme is required. This may consist of using volatile amines to neutralise carbon dioxide and/or a volatile filming inhibitor to form a barrier between the metal and the corrosive condensate. Mechanical conditions such as poor trapping and draining of lines, and air in-leakage may need to be correct-ed.
