Application Note

Application Note: TOC Measurement Of High-Purity Boiler Feed Water In Power Plants

Source: Hach Company

High-pressure boilers require high-purity feed water to limit the effect of corrosion and deposits that damage steam circuits. Typical corrosives are acid salts such as chlorides or sulfates, which form corrosive compounds. If sulfates are a result of the decomposition of the resins, and the decomposition also causes a release of organic molecules, then TOC can be used as a tracer. This method will infer the presence of sulfates and detect the formation of corrosive carbon dioxide gas (caused by the destruction of organic molecules in the boiler).