Cathodic Protection
For Docks, Piers and Jetty Structures
An introduction
Deepwater has provided cathodic protection for every type of dock and jetty structure around. Whether it be a new construction project or retrofitting the anodes on an old harbor, each structure is vastly different. To accommodate all of the variables involved with an inshore cathodic protection system (water depth, tide, temperature, salinity, etc.) we apply a suite of different products, each designed and manufactured in-house to address the various concerns involved.
The Retrobuoy Jr. is a single float impressed current cathodic protection anode sled, with mixed-metal oxide (MMO) anodes. The buoy system is by far the most efficient solution, provided that there is adequate water depth, and consistent, stable conditions. When there is not, a variety of other options are available. Retrolink sacrificial anode strings are easily installed from a small vessel, and can provide CP for up to 5 years. The VSE Anode is ideal for low-tide areas, where the structure will not always be completely submerged. As it self-buries it created a continuous flow if catodic protection when the water vanishes. Finally, for the harshest conditions, such as arctic waters or areas with very strong currents, the Raparound Pile anode is the only impressed current pile anode system on the market built to withstand these factors.
For traditional galvanic anode systems, we also provide stock pier and piling anodes, made at one our two certified ISO 9000 anode foundries: Deepwater Gaus (Houston, TX) and Deepwater MPE (Indonesia). Having access to our own foundries allows us to ensure the highest quality aluminum and zinc alloys on the market.
Related Technical Papers
Offshore Cathodic Protection 101
A brief tutorial about the science of cathodic protection as it pertains to the offshore oil & gas industry, complete with diagrams, chemical equations etc.
Technical Bulletin: Dock Cathodic Protection Retrofits
A case study of three dock / jetty retrofit projects conducted by Deepwater, accenting the versatility of Deepwater's three main jetty CP products: RetroBuoy Jr., RetroLink, and the Raparound Pile Anode.
Technical Bulletin: Raparound Survives the Winter
Installed in the Cook Inlet, Alaska and having survived two straight artctic winters, the Raparound is quickly establishing itself as the only reliable harsh environment pile anode system.
Cathodic Protection Products for Docks
Pier and Piling Anodes
For sacrificial (galvanic) cathodic protection, Deepwater provides aluminum pier and piling anodes, manufactured at one of our two foundry facilities, both of which are less than 4 years old. Having a foundry in each hemisphere allows for competitive pricing and lead times for any project.
RetroBuoy Jr.™
The RetroBuoy Jr. is a single float version of the RetroBuoy, with a gravity base. The RetroBuoy Jr. is ideal for smaller powered platforms with 3 or 4 piles in relatively shallow water. The single float can produce roughly 150 amps of cathodic protection, enough to protect approximately 30,000 ft2 of steel.
RetroLink™
Designed for minimal structures and caissons, the RetroLink system is a string of anodes installed topside, and then hung down to the sea floor . For a design of five years or less on a platform (in 85 feet of water), our Retrolink system delivers economic and effective protection
Raparound Anode™
The Raparound anode system was designed for harsh environments. An impressed current pile anode built to withstand freezing waters and strong currents in Alaska, The Raparound is provides up to a 100 Amperes of cathodic protection, for piles between 12” and 48” diameters.
VSE Anode™
The VSE Anode (Vaulted Seawater Envelope) is designed to provide reliable long-term cathodic protection in shallow water locations where the anode system must be buried below natural bottom. The unit is self-burying, creating a stable envelope of water inside its shell for the MMO anodes to operate within.