The most efficient ICCP retrofit available for mid-size structures.
The RetroBuoy™ Junior, a single-float version of our high-capacity impressed-current RetroBuoy™ cathodic protection system, is a modular impressed-current anode array rated at 150 Amperes for 20 years in its standard configuration.
The buoy's three anodes are held within a buoyant module stabilized on the sea floor by a SeaMat gravity base.
RetroBuoy™ Junior features
Current output
Each RetroBuoy™ junior can output up to 200 amps of cathodic protection current, enough to protect 30,000 sq. ft of steel.
Transformer rectifier
Each rectifier is powered by a TR located topside.
Anode float
The single anode float contains three mixed-metal oxide anodes.
FLXMT base
The RetroBuoy™ Junior tether and junction box are secured to a FLXMAT base. FLXMAT is a concrete mattress system that adds ballast and compliance to accommodate strong currents or rough bottom conditions.
Specifications
ANODE ELEMENTS
Mixed metal oxide (MMO) activated titanium tubular 1.25 in x 48 in (31.75 x 1219 mm) – center compression connected. Anodes triple coated. Each RetroBuoy™ MkIV has 4 buoyancy modules each containing 3 MMO tubes.
BUOYANCY MODULES
PE injection molded shell / vacuum filled syntactic foam 36 lb./ft.3 (576 kg/m3) – Depth rating 1000 f.s.w. (305 meters). Four buoyancy modules provided per RetroBuoy MkIV. Overall dimensions: 12.75 in Ø x 60 in long (325 x 1524 mm).
TETHERS
1" Plasma 12 strand synthetic rope.
Key design factors
Mixed-metal-oxide-activated titanium electrodes allow the anode sled to be operated at a very high current output. Installing the electrode elements in buoyant modules ensures that they remain surrounded by clean seawater.
The FLXMAT base can be assembled locally in country to provide local content requirements. Based on bottom conditions, the FLXMAT can also be engineered to any shape and size. FLXMAT is a series of modular blocks which are filled with concrete on-site.
Routing the ICCP system cable can be done in a variety of ways depending on project needs. Our partnerships with key transformer / rectifier manufacturers in the US and UK allow us to provide complete systems in compliance with any local electrical requirements and safety codes.
Assembly of the FLXMAT base with local crews and concrete satisfies local content requirements.
RetroBuoy Junior gallery
ICCP Anodes
The RetroBuoy™ Junior float contains three MMO anodes capable of outputting 150 amps of cathodic protection current.
Rugged construction
The cable management and concrete mattress base ensure a 15-20 year design life.
Transformer rectifier
The TR provides up to 150 Amps.
Installation
The single float RetroBuoy™ must be placed on the seafloor a short distance from the structure.
Related content
Spotlight
LAF-1 & 2 Platforms
Project case study: Single float RetroBuoy™ systems installed in the Gulf of Guinea.
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Technical papers
