Fouling is the undesired growth of microorganisms such as bacterial slimes, algae, mussels, barnacles within water systems, including heat exchangers, condensers, cooling towers, piping, filters and storage tanks.
Anode Supply offers cathodic protection solutions for the shipping industry, supplying aluminium, zinc and magnesium anodes, as well as anti-fouling systems.
We operate worldwide on the installation of cathodic protection in the maritime and offshore industries.
Cathodic protection against corrosion for ships
In cathodic protection, sacrificial anodes are used to protect an object against corrosion. If a less noble metal is electrically connected, by a weld or bolt connection, with the object to be protected in a conductive environment (water or soil), a galvanic coupling is formed.
The less noble metal, the anode, reacts to the release of current, creating a sacrificial effect. Because the anode acts as the weakest link in the connection, it corrodes and the object remains protected.
Anode Supply is a supplier of aluminium, zinc and magnesium anodes. We maintain a stock and can supply all types of anodes.
Zinc and aluminium anodes for ship corrosion prevention
In zinc anodes, the alloy is weaker than the metal to be protected and sacrifices itself because it is the weakest link in the connection between the anode and the surface to be protected. They are integrated as the standard prevention against corrosion in many ship maintenance plans, mainly for vessels operating in saltwater.
Aluminium anodes have been proven as effective as zinc anodes with less material needed for the same level of protection. This means that there can be a reduced number of anodes when aluminium is used, as they can last 25% longer. Aluminium anodes can also be more environmentally friendly as they do not contain cadmium.
Anode Supply can provide a range of different size and shape anodes with bolt-on or weld-on mounting. We produce our products in Europe and they are always tested on alloy. In addition to standard fixed-size anodes, we can make anodes according to customer size and shape specification.
Anti-fouling systems for vessels
As with sacrificial anodes, the anti-fouling system dissolve anodes in the environment where they are activated. Anti-fouling anodes are used to prevent biological growth of micro-organisms. This growth occurs under the waterline in places that are difficult to reach such as a water inlet and box coolers.
In order to protect box coolers, anodes with copper alloy are solubilised, which creates an environment that minimises the growth of organisms with the copper particles. Anti-fouling anodes with copper alloy are sacrificed by an electronic system.
The lifetime of the anode is related to the size and weight of the anode and can be adjusted for periodic maintenance.
Engineering and consultancy for vessel corrosion prevention
Protection against corrosion is of vital importance for the maritime industry. A good coating is not sufficient to protect an object against corrosion because it can be damaged or age. Cathodic protection is the secondary application required to prevent ships from corroding.
The use of anodes or the application of impressed current can increase the lifetime of the hull of a ship even as the rudder and water inlets. Our engineers are corrosion experts and can advise how many anodes are needed for sufficient protection, as well as creating a strategy for complex structures that need cathodic protection.
About Anode Supply
We are part of Vandervelde Protection, offering us extensive knowledge and expertise that allows us to make calculations for corrosion protection for steel and concrete constructions. The company has more than 80 years of field research and experience in supporting companies with corrosion prevention with sustainable maintenance through cathodic protection.