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Polymer solution prevents heat exchanger deterioration

Polymer solution prevents heat exchanger deterioration
Belzona Polymerics has a proven solution to prevent the detrimental effects of erosion corrosion within heat exchangers. In-service deterioration can occur through erosion damage and galvanic corrosion due to contact between dissimilar metals, commonly used in the construction of heat exchangers. If this damage is not addressed the efficiency of the system will be seriously undermined with the potential for complete failure of components, resulting in expensive operational downtime and potentially high replacement costs. 

In 2003, a heat exchanger in a major Power station in the UK had been removed for refurbishment. Following inspection, it was discovered that galvanic corrosion, coupled with erosion had caused a loss of metal thickness on the tube sheet surface. Consequently, coolant was able to contaminate the process fluid, necessitating immediate shutdown of the system, with the customer facing potentially high cost maintenance repairs.  

Belzona was able to provide a cost effective solution, utilising maintenance techniques that have been developed, whereby components can be both rebuilt and protected using polymeric compositions. A multi-purpose, two component system, based on a ceramic steel reinforced polymer was used to rebuild the eroded tube sheet and seal the leaks. To prevent future deterioration, a low temperature curing, high performance erosion corrosion resistant coating system was applied. The electrically insulating Belzona materials isolated the dissimilar metals used in heat exchanger construction, thereby eliminating further galvanic corrosion. By treating heat exchanger components in this way, efficiency can be restored to levels approaching the original design parameters and can be maintained without subsequent deterioration.
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