Cathodic production technology provides a simple, effective and low-cost way to preserve underwater wrecks against corrosion.
Cathodic protection is a common method of preventing corrosion of steel structures underwater and is used on every modern ship hull, jetty, subsea pipeline or oil platform. Protection of a shipwreck entails placing small anode structures around it and connecting them to the hull by electrical cables.
The anode structures are conical or flat steel frames containing large bricks of aluminium. When aluminium is connected to a steel structure under water, the aluminium sacrificially corrodes instead of the steel. Corrosion of the wreck can be “transferred” to the anode. The anodes will corrode, but the wreck will not, effectively halting
The implications of this are beneficial to a wide variety of wrecks. It may be used to preserve dive sites or to stop oil leaking from a corroding wreck.