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Closed Loop Corrosion Control: Case Studies Of A Reliable, Robust, & Sustainable Treatment Program

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An emerging market driver in industrial water treatment is the move to more sustainable chemistries. Corporate sustainability goals are becoming more common and more stringent. Customers are turning to water treatment companies for innovative solutions that can satisfy their sustainability goals and not sacrifice performance or asset integrity. Indeed, a major trend in evaporative open cooling water treatment is to move away from heavy metals such as zinc and other environmentally questionable materials such as phosphates. Another area of cooling water that is in need of a sustainability refresh is closed cooling loops. The most widespread closed cooling treatment programs are based on combinations of nitrite, molybdate, and borate. All three of these chemicals have regulatory, discharge and/or SH&E concerns.

Product Number: 51322-17723-SG
Author: Michael P. Weberski Jr., Claire Rayner, Dan Meier, Renate Ruitenberg, Bingzhi Chen, Sai Sudhakaran, Steef Vrijhoeven
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings and Linings , Coatings
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$20.00

Closed cooling loops are used to provide the required cooling to critical industrial equipment and processes that cannot tolerate the variability from open recirculating cooling towers. The key challenges in operating a closed loop are corrosion control and microbiological growth. A new non-toxic closed loop corrosion inhibitor program was developed that does not contain nitrite, heavy metal, P, B, or filming amine. This paper will present results from recent field trials using this new digitally-enabled, sustainable corrosion inhibitor program. The first field trial was conducted at a refinery in the Middle East that provided an opportunity to evaluate the new program in a hot loop (>90 °C) that experienced upsets and hydrocarbon ingress. A second field trial was conducted at a steel mill in Europe with a significantly more challenging makeup water that included moderate chloride and no hardness. Positive results from both field trials will be presented that will include coupon weight loss measurements, dissolved Fe concentration, and product actives monitoring.

Closed cooling loops are used to provide the required cooling to critical industrial equipment and processes that cannot tolerate the variability from open recirculating cooling towers. The key challenges in operating a closed loop are corrosion control and microbiological growth. A new non-toxic closed loop corrosion inhibitor program was developed that does not contain nitrite, heavy metal, P, B, or filming amine. This paper will present results from recent field trials using this new digitally-enabled, sustainable corrosion inhibitor program. The first field trial was conducted at a refinery in the Middle East that provided an opportunity to evaluate the new program in a hot loop (>90 °C) that experienced upsets and hydrocarbon ingress. A second field trial was conducted at a steel mill in Europe with a significantly more challenging makeup water that included moderate chloride and no hardness. Positive results from both field trials will be presented that will include coupon weight loss measurements, dissolved Fe concentration, and product actives monitoring.

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Product Number: 51322-17722-SG
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