Boiler Chemicals

Corrosion is possible in anoxic solulions, though greally accelerates in the presence of oxygen. Acidity also increases Ihe rate of iron penetration to the metal surface. Indeed, corrosion of metals is very much like the functioning of a battery and protection relies on using stable products. For example, many common antt-scalants are based on acrylic acid. These decompose at temperatures below 240 °C. The loss of the hydroxy functionality generates gases whch can, as well, cause local pitting. Sulfonated dispersants are also often working at low pressures and temperatures. At high pressures, they can produce sulfite. While this is an oxygen scavenger, it also generates SO/` which can produce scale if divalent tons are present.