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Continuum* AT4502 alkaline phosphate cooling water treatment

Water Technologies & Solutions fact sheet

Continuum* AT4502

alkaline phosphate cooling water treatment

  • Corrosion inhibitor and deposit control blend
  • Superior Dispersant
  • Maximizes corrosion protection of mild steel without the use of heavy metals
  • Controlled by a simple and accurate orthophosphate test

description and use

Continuum AT4502 is a blend of inhibitors designed to control corrosion, scale formation and fouling, in an alkaline phosphate treatment program, within open evaporative cooling systems. Continuum AT4502 provides all the benefits of Continuum technology in a single product.

typical applications

Continuum AT4502 is a combined corrosion inhibitor, scale inhibitor and dispersant product for alkaline pH phosphate based programs. The product allows the application of inorganic and organic phosphates to promote the formation of a persistent protective oxide film on steel surfaces without the formation of calcium phosphate scale deposits.

Continuum AT4502 contains the new stress tolerant polymer (STP) designed for calcium phosphate scale control and particulate dispersion caused by suspended solids and inorganic scales, such as calcium carbonate. It provides unparalleled deposition control compared to conventional sulfonate-based polymeric dispersants. It is a superior dispersant for insoluble iron.

treatment and feeding requirements

Proper treatment levels of Continuum AT4502 depend on many factors, such as corrosion and scale potential,

and conditions particular to a given installation. The product should be used in accordance with control procedures that VEOLIA establishes for a specific application.

The product may be fed directly from the shipping container or storage tank to a point in the cooling system where it will be rapidly mixed with the bulk cooling water.

Equipment recommendations for specific blends are available upon request.

For consistent protection, continuous feed is recommended. Feed of Continuum AT4502 is controlled by a simple and accurate orthophosphate test.

general properties

Physical properties of Continuum AT4502 are shown on the Safety Data Sheet, a copy of which is available upon request.

packaging information

Continuum AT4502 is a liquid blend, available in a variety of containers and delivery methods. Contact your VEOLIA representative for details.


Store Continuum AT4502 at moderate temperatures and protect from freezing. If frozen, thaw completely and mix thoroughly prior to use.

safety precautions

A Material Safety Data Sheet containing detailed information about this product is available on request.

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*Trademark of VEOLIA; may be registered in one or more

©2017 VEOLIA. All rights reserved.


E-FScContinuumAT4502_EN.docx Apr-09