Seawater Pump and Pipe Protection: A Case Study

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Seawater Pump

11th October 2024

An Australian desalination plant required a long term protective solution for a stainless steel Torishima seawater intake pump and 18-meter carbon steel pipe risers. Due to the harsh marine environment, erosion and corrosion had caused significant damage to the equipment, impacting the plant’s efficiency. A robust seawater pump refurbishment was necessary to extend the lifespan of the equipment and prevent future damage.


Resimac’s Seawater Pump and Pipe Protection Solution

  • Surface preparation involved abrasive blasting of the seawater pump and pipe risers to SSPC SP10 (NACE 2)/ISO 8504-1 SA2.5 standards.
  • Damaged areas were rebuilt with 101 Metal Repair Paste.
  • 203 Super Flow was applied at a nominal 250 microns per coat for comprehensive protection.
  • This process provided effective protection against future erosion and corrosion.

Application Details

The refurbishment began with a thorough cleaning of the pump and pipe sections to remove all contaminants and ingrained salts. After cleaning, the surfaces were abrasive blasted to achieve a surface profile suitable for effective adhesion of repair materials. Stainless steel components were prepared using non-ferrous aggregate blasting.

Pitted sections of the steel were filled using Resimac 101 Metal Repair Paste. Once the paste had cured over a nominal four hour period, the areas were machined to a smooth finish, restoring the surface profile. To protect the refurbished areas, two coats of 203 Super Flow were applied by brush and roller, each coat being 250 microns thick, providing a durable, abrasion resistant barrier.


Products Used


Results and Benefits

The seawater pump refurbishment provided the desalination plant with a durable, long lasting solution. The application of 101 Metal Repair Paste and 203 Super Flow ensured that both the pump and the pipe risers were protected against the harsh conditions of seawater intake, minimising future erosion and corrosion. The plant benefited from reduced maintenance costs, improved operational efficiency, and extended equipment life.


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