ACG is an Italian supplier of equipment for the marine industry. ACG has a global network and it is recognized as one of the leading international suppliers in its sector. In 65 years of activity, ACG has installed more than 28.000 units of Anticorrosion (ICCP) and Antifouling (MGPS) Systems and is known as one of the most competitive and reliable manufacturers of electrochemical systems (ECOLCELL).

ECOLCELL – Electro chlorination

Antifouling treatment based on electro chlorination has proved to be the most efficient and the most economical solution. It is the only system able to solve completely any problem induced by sea fouling.
ECOLCELL electro chlorination system combats macro fouling same as copper anodes and combats in addition micro fouling  in the seawater lines on board of ships, oil-rigs and power plants.

Marine fouling, shellfish, seaweed, slime, bacteria, etc. find their way into sea water cooling systems on board usually as micro-organism, settles and grows and if not combated in-time go on to block pipes, filters, valves, intake grids, heat exchangers etc.

ECOLCELL operates by using an electrolytic cell containing Titanium anodes in mixed metal coating (MMO) to transform the Sodium Chloride (NaCl) in seawater into Sodium Hypochlorite (NaOCl) through a process of electrolysis. The antifouling agent is injected into the sea chests from where it is dispersed through the whole sea water system. Only a small concentration of this Sodium Hypochlorite is required to combat marine fouling, normally inbetween 0.1 to 0.3 ppm.

The system operates on the principle of electrolysis: a low voltage is applied to seawater circulation in a cell, producing Sodium Hypochlorite without any addition of chemical products.

COPRON – Antifouling

ACG also developed a traditionell antifouling system, COPRON, based on Copper & Aluminium Anodes mounted in the sea chest or sea water filter, to prevent marine fouling inside of the cooling sea water circulation.

How it works

As copper is a more noble metal than the material used in the pipe-work, the presence of copper ions in the seawater will cause galvanic corrosion of the pipes, but by fitting an aluminium (Al) or iron (Fe) anode in close proximity to the copper anode, one can achieve some corrosion control by creating an anti-corrosive layer on the internal surfaces of the piping.
The copper and aluminium anodes are consumed by the dissolution of ions into the seawater.

As they are installed in the sea chest, they have to be replaced during dry-docking. Hence, the anodes are usually designed for a lifetime of 2-3 years up to 5 years.
The cost of replacement represents considerable maintenance costs, unfortunate often neglected by the ship owners when evaluating the costs of various systems.

MARIMPRESS – Impressed current cathodic protection (ICCP)

MARIMPRESS impressed current cathodic protection system (ICCP) is used to protect ships‘ hulls, floating dry-docks, oil-rigs and other submerged steel structures from corrosion.

The system operates by continually measuring the potential of the submerged steel surface using hull-mounted Zinc reference electrodes. If this potential starts to rise above the preset value (+220mV for steel hulls – at higher potentials corrosion will occur), the rectifier supplies the correct amount of DC current to hull-mounted activated Titanium anodes needed to maintain the preset value. In this way, not only the hull, but when technically earthed also the rudder, propeller, shaft and stabiliser fins are completely protected from corrosion.

This system uses Titanium MMO coated anodes as opposed to sacrificial Zinc or Aluminium anodes, which last longer and cost less to replace.

MARIMPRESS makes use of titanium anodes which give the system a life of more than 10 years.

For more information please check: www.acgmarine.com