GenGard
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Catalog excerpts

Water Technologies & Solutions fact sheet GenGard* Technology for open recirculating cooling systems  Maintains System Cleanliness Only Halogen Stable Technology in the World Uncompromised performance under stressed conditions description and use GenGard* is the most advanced and effective water treatment technology for open recirculating cooling systems. GenGard treatment programs can be applied across the entire pH spectrum from neutral to alkaline and ensure uncompromising results even under the most stressful conditions. The programs incorporate the most advanced deposit and corrosion additives available. The patented GenGard technology includes a new Stress Tolerant Polymer (STP), Alkaline Enhanced Chemistry (AEC) and halogen resistant azole (HRA) in combination with phosphate-based steel corrosion inhibitors. All GenGard treatment components are stable and retain their effectiveness in the presence of chlorine and other halogens. Halogen stability allows Legionella compliance when chlorine or bromine residuals are continuously applied at effective levels (0.5-1.0 ppm free Cl ) for general microbiological control and during periodic system disinfections (> 5 ppm free Cl ). Unlike conventional treatments, GenGard provides the freedom to effectively respond to microbial upsets without a loss of deposition or corrosion control. 2 The stress tolerant polymer (STP) is the culmination of more than 30 years of polymer research at SUEZ Water Technologies & Solutions. Figure 1: Calcium phosphate inhibition at 400 ppm calcium hardness, pH 8.2, 10 ppm PO , 160ºF (70ºC) 4 STP is designed to maintain phosphate-based and zinc-based corrosion inhibitors soluble. (Figure 1). The STP performance far exceeds that of conventional polymeric dispersants, providing exceptional corrosion protection while preventing deposition even in the most demanding applications. The STP performance is not adversely affected by aluminum carryover from influent clarifiers, high temperatures encountered with low flow heat transfer equipment or soluble iron generated from corrosion or entering with the makeup water. AEC is the only effective non-phosphorus calcium carbonate scale inhibitor for open recirculating system operation above 2.5 LSI (Langelier Saturation Index). Breaking the calcium carbonate supersaturation barrier of organic-phosphate scale inhibitors (phosphonates), AEC provides excellent deposition control under severe conditions where others fail. AEC’s superior calcium tolerance and hydrolytic stability permit high cycle operation even under the most stressed conditions. Find a contact near you by visiting www.suezwatertechnologies.com and clicking on “Contact Us.” *Trademark of SUEZ; may be registered in one or more countries. ©2017 SUEZ. All rights reserved. FS1296EN

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GenGard products include HRA, a modified azole that provides unequaled copper alloy corrosion protection. HRA is halogen stable and capable of maintaining effective corrosion inhibition even in the presence of chlorine and bromine-based biocides. Conventional azole inhibitors, such as tolyltriazole and benzotriazole, are readily halogenated in the cooling water, preventing the establishment and repair of a protective film on the metal surface. HRA maintains its activity both in the water and on the metal surface, ensuring continuous protection for copper alloys. HRA also reduces copper...

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