Veolia Water Technologies & Solutions

Cooling Water Corrosion Treatment

Extend asset life by minimizing corrosion in your cooling system

Veolia has consistently been a leader in developing and delivering effective cooling water corrosion control chemistries. Veolia offers multiple patented material and approaches for corrosion control that can be applied across the entire pH spectrum to ensure uncompromising results even under the most stressful conditions.

Featured Products

GenGard* Technology for Open Recirculating Cooling Systems 

GenGard* Technology for open recirculating cooling systems is the most advanced and effective water treatment technology for open recirculating cooling systems. 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.

GenGard Corrosion Treatment Features & Benefits

By taking a proactive approach to corrosion control, the following features and benefits are realized:

Improves productivity and equipment reliability 

  • Maximizes heat transfer efficiency
  • Improves process throughput
  • Reduces downtime for routine cleanings
  • Extends turnaround and longer runs

Increases Safety 

  • More forgiving chemistry that helps protect assets
  • Reduces problems from unscheduled shutdowns

Reduces Total Cost of Ownership

  • Ability to use alternative water sources
  • Cleaner equipment leading to lower overall costs and fewer cleanings

Cost Effective Performance

  • Superior protection when compared to any other chemistry available in the market
  • Cost competitive with market alternatives


What is corrosion?

Corrosion is the destruction of a metal by chemical or electrochemical reaction with its environment. In cooling systems, corrosion causes two basic problems. The first and most obvious is the failure of equipment with the resultant costs of replacement and plant downtime. The second is decreased plant efficiency due to loss of heat transfer, the result of heat exchanger fouling cause by the accumulation of corrosion products.

Corrosion occurs at the anode, where metal dissolves. Often, this is separated by a physical distance from the cathode, where a reduction reaction takes place. An electrical potential difference exists between these sites, and current flows through the solution from the anode to the cathode. This is accompanied by the flow of electrons from the anode to the cathode through the metal.

Corrosion Control

What is corrosion control in water treatment?

Corrosion control requires a change in either the metal or the environment. The first approach, changing the metal is expensive. Also, highly alloyed materials, which are very resistant to general corrosion, are more prone to failure by localized corrosion mechanisms such as stress corrosion cracking.

The second approach, changing the environment, is a widely used, practical method of preventing corrosion. There are three ways to effect a change in environment to inhibit corrosion.

  • Form a protective film of calcium carbonate on the metal surface using the natural calcium and alkalinity in the water.
  • Remove the corrosive oxygen from the water, either by mechanical or chemical deaeration or add corrosion inhibitors.

Case Studies

Cooling water corrosion control case studies

Veolia’s GenGard corrosion control chemistries have successfully been used across many different industries to minimize corrosion in cooling systems. Here are some examples:

GenGard saves fertilizer producer $420,000 & doubles the time between turnarounds