Schottel, headquartered in Germany, recently announced its patented ProAnode sets new standards in corrosion protection, which it says extends the lifecycle of the thruster.
The company said moving the position of the anode from the outside surface into the cross-section of the nozzle tail leads to subsequent operational benefits, such as reduced flow interference, resulting in fuel savings.
Schottel’s core idea was to remove the anodes from the outside surface of the nozzle, where they are prone to being knocked off by flotsam, such as wood or ice, or even by slight ground contact. The company said that loss of the anodes is usually only discovered during maintenance downtime, by which time corrosion might already have become a problem.
Depending on the nozzle’s diameter and the anode’s material, anodes with up to five years of cathodic protection against corrosion can be integrated into the nozzle. This enables a reduction of additional anodes for the hull or other thruster parts.
The new position in the tail of the nozzle not only shields the anodes, but also offers additional operational potential as it contributes to the optimal hydrodynamic flow of the nozzle.
As its smooth overall surface reduces flow interference, the anode allows for an efficient propulsion system. It results in lower fuel consumption and pays off in terms of reduced operating costs.
The Schottel Group is a manufacturer of propulsion and steering systems for ships and offshore applications.
Founded in 1921, the company has been developing and manufacturing azimuth propulsion and maneuvering systems, complete propulsion systems with power ratings of up to 30 mw., and steering systems for vessels of all sizes and types, for about 65 years. There are approximately 100 sales and service locations around the world.
Caption for photo: The new position in the tail of the nozzle not only shields the anodes, but also offers additional operational potential as it contributes to the optimal hydrodynamic flow of the nozzle. (Photo courtesy of Schottel)