Fact Sheet OptiSperse* HP54674 Internal Treatment (High Purity Systems) • Outstanding protection against metal oxide deposition and caustic corrosion Designed and field proven for high pressure boilers Cost-effective program cuts downtime and maintenance Provides optimum pH/phosphate control neutralizes any free caustic in the boiler water. GE Water & Process Technologies formulates the sodium-to-phosphate ratio required to keep your system within control limits. This combination of chemical mechanisms provides the most effective coordinated phosphate/pH control program available. This treatment buffers the boiler water, preventing localized pH excursions that lead to corrosion of boiler metal (Figure 1). Description and Use OptiSperse* HP54674 is an aqueous blend of phosphate and polymeric dispersants. The product contains SCP, a synthetic carboxylated polymer, which disperses iron and other metal oxides. OptiSperse HP54674 may be used alone or in combination with other OptiSperse HP products, depending on the feedwater quality, to provide optimum pH/phosphate control in high pressure boilers. Typical Applications Hardness is a minor constituent in water of high purity. The major contaminants are typically iron and copper oxides. Iron deposits are very porous; this porosity makes the road to caustic corrosion possible. As steam escapes through the chimney-shaped deposits, dissolved solids concentrate under the deposit. Hydroxide is the predominant anion. As such, sodium hydroxide can concentrate under the deposit to produce caustic levels of 10% or more. This results in caustic gouging of boiler metal. Figure 1: Control diagram for a coordinated phosphate/pH program. The other key to GE program effectiveness is our metal oxide-specific polymeric dispersant technology. Our tailored treatment approach uses SCP, synthetic carboxylated polymer, to disperse iron and other metal oxides, maintaining clean heat transfer surfaces. Caustic corrosion is prevented by maintaining a phosphate buffer with coordinated control. OptiSperse HP54674 fights the problem on two fronts. First, its exclusive polymer controls metal oxide deposits. Second, its built-in phosphate buffer Find a contact near you by visiting www.gewater.com or e-mailing [email protected]. Global Headquarters Trevose, PA +1-215-355-3300 Europe/Middle East/Africa Heverlee, Belgium +32-16-40-20-00 ©2007, General Electric Company. All rights reserved. * Trademark of General Electric Company; may be registered in one or more countries. Asia/Pacific Shanghai, China +86 (0) 411-8366-6489

Treatment and Feeding Requirements Feed Point - Boiler steam drum via separate chemical feedline. Feedrate - Sufficient OptiSperse HP54674 should be fed to maintain the recommended boiler phosphate residual. Feedrates depend upon operating pressure, heat transfer rate, feedwater quality, and type of fuel burned. Dilution - Use good quality condensate, demineralized water, or deaerated boiler feedwater to make a convenient feeding strength. The material may be fed neat (dilution slip stream recommended) or diluted in any proportion. If diluted, mild agitation should be provided. Equipment - OptiSperse...