Cathelco impressed current cathodic protection (ICCP) systems have been installed on more than 30,000 vessels where they provide effective and reliable protection against hull corrrosion.

In recent years, Cathelco have developed the C-Max anode range to enhance the performance of their systems whilst also simplifying anode installation and replacement.

The latest development is the introduction of Quantum systems which enable control panels to be used in a ‘master’ and ‘slave’ configuration. This enables the system to be controlled and monitored more easily as well providing comprehensive data.

How does an ICCP system work?

The purpose of an ICCP system is to ‘neutralise’ the naturally occuring corrosive activity which takes place on the surface of ship’s plates and weld seams. Systems consist of arrangement of hull mounted anodes and reference electrodes which are connected to a control panel. Larger ships generally have “forward” and “aft” systems, whilst smaller vessels are “aft” only. In operation, the reference electrodes measure the electrical potential at the hull/seawater interface and send a signal to the control panel which automatically raises or lowers the output to the anodes. In this way, the hull receives the optimum level of corrosion protection at all times.

C-Max Linear anodes-
diver changeable

Cathelco produce a range of linear anodes (50-300A) which are diver changeable, avoiding the need for drydocking. The anode elements are made from titanium with a coating of mixed metal oxide. They are mounted on a backing sheet made from strong, but lightweight ABS plastic.

Self torquing snap-nuts

For faster installation, C-Max linear anodes have self torquing snap-nuts. When the correct torque is achieved using an ordinary wrench, the top section of the nut snaps off leaving the lower section for future use.

C-Max Disc anodes

C-Max Disc anodes, generally used on ‘forward’ installations are also diver changeable (50-175A).They come with a unique coffer dam design which enables the anode to be easily removed with the help of an on-board technician.

Reference electrodes

Reference electrodes measures the electrical potential at the seawater/hull interface. They are generally supplied with zinc elements, but are available with silver/silver chloride elements.

Quantum controlling the whole system from one location

The latest Quantum control panels enable the ICCP system to be monitored and controlled with the minimum time and effort. On forward and aft systems, the panel operates in a ‘master’ and ‘slave’ configuration. This means that the forward system can be controlled by the aft panel and information about the whole system can be viewed in one location. A RS485 link also enables the data to be relied to control room or bridge computers.

Quantum control panels

The Quantum ‘master’ panel stores comprehensive data about the configuration of the system which can be monitored through a series of displays. It also logs data concerning the performance of the system covering output voltage, output current, potential readings, percentage output and alarms. The data can be uploaded to a USB stick and e-mailed to Cathelco for analysis. This eliminates the need for completing paper log sheets.