Wednesday, April 20, 2011

Phosphate/Polymer Scale Prevention Chemical

The most common scale prevention boiler chemicals are polymers and phosphates.  Polymers and phosphates are designed to remove trace elements that escape past the softeners in your boiler water and steam water.   

For "hard" water conditions, phosphates are preferred.  Phosphates will react to the calcium to form calcium phosphate.  The calcium phosphate sinks to the boiler bottom and is released during manual bottom blowdowns.  Also, calcium phosphate scale is light and easier to wash away during annual inspection of your steam boiler and boiler water..

For good working softeners that produce "soft" water, polymers are preferred. Polymers react with the trace calcium that leaks through the softener and is flushed away with the surface blowdown.

Failure to use a good working softener with a scale prevention chemical, may result in boiler scale. Boiler scale will decrease the boiler heat transfer efficiency.  This condition will lead to higher energy costs.  Excessive scaling may result in early tube replacement and in some cases if the scale bridges between tubes, it may result in catastrophic boiler failure, i.e. boiler explosion.



BC 1595 is a concentrated phosphate based formulations with a carboxylated organic copolymer designed for use as a boiler water treatment. The product is designed for use in boiler systems having softened makeup water and operated on the modern, low phosphate cycle. Boiler Chemical 1595 provides one of the most modern and effective copolymers for higher heat transfer boilers.