Retrofit cathodic protection anodes for a fixed platform in the Egyptian Red Sea
Deepwater installs a retrofit cathodic protection system for a fixed platform in the Red Sea in under 24 hours.
In April 2010, Deepwater Corrosion Services, in conjunction with Egyptian agent Los Amigos, retrofitted the cathodic-protection system of a fixed platform in the Red Sea. The platform is located in 14 meters of seawater approximately one kilometer off the coast of Egypt. The owner required another 20 years of service from the aging structure, which was easily accomplished using the RetroPod / RetroClamp system.
RetroPod subassemblies were shipped via container to Egypt from Deepwater’s Houston manufacturing facilities. Once unloaded from the container, Pods were erected and welded together dockside. Meanwhile, the Pods’ ballast mattress shells were filled with concrete and attached to the Pods. After lift testing, the Pods and RetroClamps were loaded onto the installation diver-support vessel, Maridive’s Expedition. Once tied up to the platform and after minor debris removal from the seabed, all 14 RetroPods and RetroClamps were installed and commissioned in 20 hours.
Structure potentials were monitored using a diver handheld CP probe as well as a topside-deployed DC-II drop cell (all silver/silver chloride). CP potentials prior to the retrofit were at or near the native state of steel (i.e. (-)0.670 Volts [Ag/AgCl]); after retrofit, potentials ranged from (-)1.050 to (-)1.080 Volts. This was the first retrofit of its kind in the Red Sea and Deepwater is thrilled with the outcome.
RetroClamp installed by divers in the Red Sea
Mattresses are filled with concrete onsite to save on shipping expenses.
RetroClamp being positioned and installed on the diagonal member.
Pods are then set atop concrete mattresses and attached.
The diver turning the T-handle to create electrical contact.
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Project Case Study: Cathodic protection retrofit on five structures in fourteen days