Subsea Cathodic Protection

Corrosion control is an essential element of asset integrity strategies for all offshore structures. This is valid for both its initial stages and throughout its planned life span. For field life extension projects this becomes essential.

Imenco Corrosion Technology provides solutions, services, and products for corrosion monitoring and corrosion protection. Our company’s roots are in subsea engineering. Our core competences and products were initially ROV installable solutions for retrofit installation of cathodic protection. From these roots, we have developed a wide range of cathodic protection methods and products for the Ocean Industries and mainly for Offshore Oil and Gas and Offshore Wind. We have developed standardized solutions and working methods for a wide range of retrofit situations.  These solutions provide a cost effective, diver-less, and very reliable method for installation of cathodic protection without any need for welding on site.

We are flexible in our project execution and, depending on customer requirements, our scope of supply can range from complete EPC projects to delivery of single components.

Live Wireless CP Monitoring

o limits to capacity and possibilities: The Ocean observatories from Imenco Future Technologies can be used for a number of capacities to monitor issues relevant both to environmental and security concerns

The idea and methodology behind METAS[subsea-acoustics] – Subsea Environmental Monitoring  was born in the mid 1990s at the Institute of Marine Research. It has since evolved from studying of fish and its behavior’s to detection of oil and gas leakage as well as stationary real time environmental monitoring. From years of acoustic surveying with vessel acoustics, we discovered that the collection of data along transects created two types of uncertainties: Fish were disturbed by the survey vessel and stock estimates affected accordingly. Mixing of spatial and temporal variability hid properties of ecosystem dynamics that were essential to understanding marine ecosystems. X-net® system is a modular sensor deployment and retrieval system for environmental monitoring and surveying. The infrastructure is expandable to as many connection points as needed and can be adapted according to the requirements of a given project. The system uses fibre optics for communication between nodes and can support power supply of 3.0 kV AC.

The system is designed to allow maximum flexibility in customization with minimal engineering expense [subsea-acoustics] – Subsea Environmental Monitoring .

  • X-Node® which is a ‘docking station’ for an X-Frame ®, providing power and communications distribution to the X-Frame in a cabled set-up. The X-Node will step down system voltage to 220 VAC for supply to the X-Frame. The X-Node is not designed for easy retrieval, as a docking station it is intended to be a permanent resident on the sea bed until the project is complete.
  • X-Frame® is the deployable unit which houses all of the sensors, cameras, data collection & storage, and any battery systems. The X-Frame is easily retrievable using an ROV running tool or using the Metas Landing and Retrieval Tool (X-LRT) which allows installation without the support of an ROV.
  • X-SAT® is a secondary external sensor platform for cameras, flash and specific sensors. It is linked to an X-Frame with a wet mate connector for power and signal.
  • [subsea-acoustics] – Subsea Environmental Monitoring
  • X-LRT® is the Landing and Retrieval Tool for X-Frames, which allows installation of an X-Frame on an X-Node or base unit without the support of an ROV.

Live Wireless CP Monitoring

Imenco Subsea Acoustic Products

Solutions & Applications

Piranha-Showcase-Rendering-03_2 Imenco Solutions & Applications

This section presents samples of how the Cathodic Protection System may be installed – primarily for retrofit projects.

Earthing Connection Clamps


The anode will need a good electrical connection to the structure. Imenco have developed a wide range of well proven connectors for quick and easy subsea installation. If you have a structure – We can connect.

Sacrificial Anodes & Assemblies


Imenco Clamp Installation Tool


Cathodic Protection Services - Design and Assessment

Design and Assessment



For any project we recommend that you discuss your project with our engineers as early in the process as possible. The earlier we come into the process – the better result we can achieve both in terms of quality and cost.

We have delivered cathodic protection solutions to clients in the offshore oil and gas for more than 15 years and to the fast growing offshore wind sector for 3 years. Even if most projects have elements that make them unique and therefor need some degree of individual engineering and planning individually, we can build on solutions developed for previous projects. We operate on a “modular philosophy” where the same standardized products and methods can be used for a wide range of applications. Some of those products and solutions are included as standard items in our toolbox – refined through years of experience. Through this standardization  we can deliver products that are well documented, with short delivery times (often delivered from stock) and with the cost benefit that comes from repeated manufacturing. These products, methods and solutions are available and can easily be implemented as building blocks in a cathodic system design performed by us or by our clients.

We have presented some samples of previous project specific solutions as well as samples of standard products below. These examples cover Offshore Wind projects, Subsea Pipeline retrofit projects, solutions for cathodic retrofit of jacket structures  and others.

Imenco monopile cathodic protection2

Corrosion control is an essential element of asset integrity strategies for all offshore structures.

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