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Cooling Water Chemical Treatment

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Our Range of Cooling Tower Water Treatment Chemicals

HydroChemie have a full range of cooling tower water treatment chemicals. This range also contains many specialist products formulated for use in specific specialist situations or for use in response to problematic situations. Our Technical department is always available for advice on product selection, problem solving, and compatibility with other formulations already being used in certain systems. A summary of our core range of products is below, many other formulations for cooling water systems are also available.

Scale and Corrosion Inhibitors

Product code CompositionComments
HC46A blend of phosphonates, polymers and azolesConcentrated all organic corrosion and scale inhibitor for soft waters. Suitable for water hardness 25 – 250ppm
HC664A blend of phosphonates, polymers and azolesAll organic corrosion inhibitor for medium hardness waters.
HC48A blend of phosphonates, polymers and azoles.Medium strength all organic corrosion inhibitor for high hardness waters.
HC45A blend of phosphonates, polymers and azoles & sodium bromideAll organic corrosion inhibitor for naturally soft waters. Contains sodium bromide for cost effective generation of hypobromous acid when dosed with sodium hypochlorite.
HC50Silicate based soft water inhibitorConcentrated low toxicity silicate based corrosion inhibitor for naturally soft and softened water.
HC52Sodium molybdate based soft water inhibitorConcentrated high molybdate based corrosion inhibitor designed for soft water. Benefits from some hardness being present.
HC1260Sodium molybdate based soft water inhibitorCost effective molybdate based soft water inhibitor. Benefits from some hardness being present
HC540A blend of phosphonates, phosphates, polymers and azoles.A phosphate based product specifically designed for the passivation of Galvanised towers.
HC250Supplementary product to control phosphates where there are high levels of phosphates in make-up water.A blend of polymeric dispersants.
HC197Zinc based corrosion and scale inhibitorA zinc based corrosion inhibitor for cooling towers.

HC472An acidic zinc based aqueous solution.A specialist scale and corrosion inhibitor for use in cooling systems, can processing, pasteurisation, and sterilisers.

Scale and Corrosion Inhibitors (+ Sodium Bromide)

Often, cooling tower biocidal treatment is accomplished with bromine based oxidizing biocides generated from dosing sodium bromide solution in conjunction with sodium hypochlorite. On some sites it is more convenient and economical to dose a scale and corrosion inhibitor containing sodium bromide in conjunction with sodium hpochlorite in order to generate hypobromous acid for microbial control.

Product code CompositionComments
HC456A blend of phosphonates, polymers and azoles & sodium bromideAll organic corrosion inhibitor for medium hardness waters. Contains sodium bromide for cost effective generation of hypobromous acid when dosed with sodium hypochlorite.
HC457A blend of phosphonates, polymers and azoles & sodium bromideAll organic corrosion inhibitor for high hardness waters. Contains sodium bromide for cost effective generation of hypobromous acid when dosed with sodium hypochlorite.
HC785Silicate based soft water inhibitor & sodium bromideConcentrated low toxicity silicate based corrosion inhibitor for naturally soft and softened water. Contains sodium bromide for cost effective generation of hypobromous acid when dosed with sodium hypochlorite.
HC974Zinc based corrosion and scale inhibitor & sodium bromideA zinc based corrosion inhibitor for cooling towers. Contains sodium bromide for cost effective generation of hypobromous acid when dosed with sodium hypochlorite.

Scale and Corrosion Inhibitors (+ Biodispersant)

Biofilm build up within a system will greatly inhibit the heat transfer efficiency of the system as well as blocking pipework. A build-up of biofilm within a system will also encourage the growth of Legionella bacteria and may promote the formation of under deposit corrosion. Biodispersants can be incorporated in the treatment regime for cooling towers in a number of ways including within the formulations of some of our range of scale and corrosion inhibitors.

Product code CompositionComments
HC1437A blend of phosphonates, polymers and azoles & biodispersantAll organic corrosion inhibitor for low hardness waters. Contains biodispersant.
HC1436A blend of phosphonates, polymers and azoles & biodispersantAll organic corrosion inhibitor for high hardness waters. Contains biodispersant
HC1435Silicate based soft water inhibitor & biodispersantConcentrated low toxicity silicate based corrosion inhibitor for naturally soft and softened water. Contains biodispersant
HC1438Sodium molybdate based soft water inhibitor & biodispersantCost effective molybdate based soft water inhibitor. Benefits from some hardness being present. Contains biodispersant

Biocides

The water within a cooling system provides optimal growth conditions for many species of bacteria, including Legionella spp. The warm environment and high levels of organic debris make for a particularly pleasant environment for rapid bacterial growth if this is left uncontrolled.

Legislation requires that cooling towers must prevent the proliferation of Legionella bacteria within these systems as a precaution against the outbreak of Legionnaires disease. It is therefore critical that the correct biocidal treatment regime is implemented and regular checks are carried out to ensure that bacterial populations within the system are kept under control.

Biocides can be divided into 2 main groups; oxidising biocides and non-oxidising biocides:

  • Oxidising biocides simply oxidise microbial cells and will kill most micro-organisms including bacteria, algae, fungi, and yeasts
  • Non-oxidising biocides kill microorganisms typically by disrupting the organism’s metabolism or damaging the cell wall.

Biodispersants do not kill organisms but they do break up any deposits of microorganisms allowing the biocides to attack the organisms more effectively. They also inhibit the attachment of microorganisms to metal surfaces.

Oxidising Biocides

Product code CompositionComments
HC5414/15% sodium hypochlorite + biodispersantA chlorine-based biocide for the treatment of cooling towers. Dosed 1:1 with HC1422 to generate hypobromous acid
HC102Sodium HypochloriteSodium hypochlorite 14/15%
HC138Concentrated sodium bromide solutionA solution of sodium bromide for the treatment of cooling towers. Dosed 1:3 with HC54 to generate hypobromous acid.
HC476Bromine tabletsA mixture of brominated and chlorinated hydantoins.Releases both bromine and chlorine in the form of hypobromous acid and hypochlorous acid. The product should be dosed using a purpose built brominator to ensure good dose control.
HC1422Sodium Bromide solutionA solution of sodium bromide for the treatment of cooling towers. Dosed 1:1 with HC54 to generate hypobromous acid.

Non-Oxidising Biocides

Product code CompositionComments
HC63Concentrated THPS based biocide & biodispersantLow toxicity. Excellent against Pseudomonas spp, Legionella spp and algae. Concentrated formulation. The biodispersant in the formulation enhances biocidal activity, removes biofilm and prevents the formation of additional biofilm.
HC66Contains a polymeric quaternary ammonium compoundVery effective algaecide for use in open cooling systems and swimming pools
HC67Quaternary ammonium chlorideA broad spectrum disinfectant and biocide. Effective against Legionella. Effective in heavily soiled systems. Good surfactant properties. Rapid biocidal action.
HC105BNPA broad-spectrum bactericide. Low toxicity. Effective against Legionella.
HC529DBNPAHas a broad spectrum of activity against bacteria and their spores, fungi, also effective against Legionella spp. Rapid biocidal action.
HC963BiodispersantExtremely low foaming. Improves the effectiveness of any biocide programme.
HC1507GlutaraldehydeHas a broad spectrum of activity against bacteria and their spores, fungi, also effective against Legionella spp. Rapid biocidal action. Concentrated product.
HC1528ProprietaryA highly effective non-oxidising biocide containing a synergistic combination of biocides. Ideal for use in closed circuit or open cooling systems. Effective against, Pseudomonas spp and Legionella spp.

Pack Cleanse Range

Our PackCleanse cleaning system; effectively cleans light to moderately fouled packs in place by combining the disinfecting power of chlorine dioxide, with the cleaning power of a weakly acidic surfactant mixture. The system produces a high-cling foam which is applied to surfaces to be cleaned under low pressure. The design of the dosing equipment is important. A stable wet foam is essential. Please contact us for advice on the optimal equipment for use in applying this range of products.

Product code CompositionComments
HC740phosphoric acid and surfactantFoam cleaning detergent for the cleansing of cooling tower pack. Forms a stable wet foam that is able to slowly flow through the tower packing. Mildly acidic so as to remove inorganic scales. An effective alternative cleaning solution where it is not possible to remove cooling tower pack.
HC743Contains stabilised chlorine dioxide.A powerful disinfectant for use in the cleaning and disinfection of cooling tower packing. Activated when mixed with HC740 or HC741.
HC744Silicone based antifoamDe-foamer for use in cooling tower foam cleaning. Breaks down stable acidic foam. Apply to the tower sump at the end of the pack cleaning procedure.
HC745Contains acid and chlorine neutralisers.Neutraliser for use in cooling tower foam cleaning

Range

  • Solid Chemistry

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