ICCP Hull Corrosion Protection Systems

The Problem of Corrosion Corrosion takes many forms in the marine environment. It can be seen as pitting on hull plates; in the disintegration of weld seams; around bow thrusters and on the surfaces of rudders and other vital components. A well designed ICCP system can eliminate these problems, safeguarding the structural integrity of the vessel and significantly reducing maintenance costs throughout its operational life. By installing a Cathelco system you can have the advantage of world leading ICCP technology combined with the expertise which goes with wide understanding of corrosion problems...

Cathelco ICCP systems for vessels of every type Cathelco C-Shield impressed current cathodic protection (ICCP) systems have now been fitted to more than 10,000 vessels around the world, establishing a record of effective performance and reliability on ships of every type: Cruise Ships Container Vessels VLCCs Ferries FPSOs Ice Class Vessels Cathelco have recently introduced C-Max anodes, a new range of linear and disc anodes which combine high performance with a number of features to simplify installation. The most important feature is that they are diver changeable enabling them to be replaced...

Impressed Current Cathodic Protection Systems RUDDER BONDING REFERENCE ELECTRODE C-MAX LINEAR ANODE REMOTE MONITORING UNIT SHAFT EARTHING ASSEMBLY CONTROL PANEL 50-75A & 100A Linear Anodes Designed with a single current emitting element either 25 or 32mm diameter, these anodes are exceptionally lightweight and versatile. Size: 740mm x 400mm Weight: 7 Kg Produced with two 32mm diameter elements these high performance anodes are easy to install. Designed for the largest vessels, these anodes have three elements to produce outputs of up to 300A.

Most operators recognise the need to combine modern hull coatings with a purpose designed impressed current cathodic protection system. The C-Shield system suppresses corrosion on the wetted surface of the hull using an arrangement of hull mounted anodes and reference electrodes connected to a control panel. This neutralises ‘corrosion cells’ and eliminates problems that arise through dissimilar metals and the proximity of components such as propellers. How ICCP systems operate The most important feature of an ICCP system is that it automatically detects the electrical potential at the hull/seawater...

ICCP Linear Anodes Faster and more reliable installation with self-torquing snap nuts Smaller footprint – fewer fixings C-Max anodes have been developed by Cathelco to combine maximum performance with numerous features which speed-up installation. The advanced design means they are exceptionally lightweight and can be easily carried by one man. They also have a small footprint which means that fewer fixings are required, reducing installation time. Diver changeability is another key feature enabling them to be replaced without the need for drydocking. Self torquing snap-nuts save time and effort...

ICCP Disc Anodes Designed to be easily diver changeable Easier installation – higher performance C-Max disc anodes are generally used for ‘forward’ ICCP systems where their circular shape reduces the risk of physical damage and helps to maintain the flow dynamics at the bow of the vessel. Their low profile also avoids the problem of rubbing by anchor chains. The current emitting face of the C-Max disc anode is made from mixed metal oxide (MMO) on a titanium substrate. This is contained within a rubber over-moulding which creates a watertight seal with the hull and protects the edge of the anode....

A choice of control panels Thyristor Panels C-Shield thyristor control panels combine cost effectiveness with rugged reliability that has been proved on vessels of all sizes worldwide. They also incorporate the latest computerised information systems enabling the status of the ICCP system to be monitored by ships’ computers. Thyristor control panels can be used for systems of up to 1,000 amps with 8 anodes and 4 reference electrodes being controlled by an individual panel. They are ideal for the requirements of cruise ships, VLCCs and many types of container and cargo vessels. The popularity...

Shaft Earthing Even on ships fitted with ICCP or sacrificial anode systems, propeller shaft bearings are vulnerable to corrosion. This is because turning propeller shafts are electrically insulated from the hull by the lubricating oil film in the bearings and by the use of non-metallic bearing materials in the tail shaft. The problem can be eliminated if the shaft is earthed to the hull using a propeller shaft slipring. Cathelco supply complete shaft earthing assemblies consisting of a pair of high silver content/graphite compound brushes mounted in a balanced brush holder, running on a copper...

Large Thruster Tunnel ICCP Systems Anode 3 Stbd. Stern REF Electrode Bottom Anode 4 Bow and stern thruster protection is a specialised area where Cathelco have developed a system which is uniquely effective in providing corrosion protection. Problems of corrosion arise because of the dissimilarity of the materials used in the hull and thruster tunnel construction and remain unchecked because they are outside the scope of conventional ICCP systems. The Star Ismene is fitted with bow and stern thruster tunnel ICCP Systems Cathelco’s thruster tunnel systems are installed on ocean going vessels,...

A system specifically designed to protect your ship against corrosion Replacement Anodes C-Shield anodes can be used as direct replacements for any ICCP system currently used in the world. They are also designed to be totally compatible with the full range of manufacturers’ control systems. This enables operators to benefit from the latest developments in anode technology, whilst providing considerable cost savings in comparison with replacement using conventional designs from the original equipment manufacturer. Easier installation System Design C-Shield systems are specifically designed for...