Mil Spec A-18001 Zinc Alloy

Side-Power (Sleipner) Thruster Zinc and Aluminum Anodes

This category is a mix of both Zinc and Aluminum Anodes for Side Power (Sleipner) Thrusters.

Starting June 2010, Imtra is fitting Side-Power (Sleipner) thrusters with Mil-Spec Aluminum anodes to provide improved corrosion protection.  Compared to zinc anodes, aluminum anodes provide superior protection in brackish and freshwater, while still providing excellent protection in salt water.  For more information on Imtra’s conversion, click the following link:  Imtra's Conversion to Aluminum Anodes (PDF)

In June 2021 the name "Side-Power" was retired and rebranded as "Sleipner" [Slipe-ner].  Sleipner Motor AS is the Norwegian company that designs and manufacturers these thrusters for worldwide use.  Click here to learn more about the rebranding:  Side-Power Rebranding to Sleipner (PDF).
Q:  I was under the impression that one was not to mix zinc and aluminum anodes on a boat.  If aluminum is only available for my Imtra thruster should I switch the others to aluminum?Side Power (Sleipner) SE30

 A:  Side-Power (Sleipner) thrusters are engineered to have their underwater metals electrically isolated from the rest of the boat.  This means that there is no electrical path available for the thruster (or its anodes) to interact with any other underwater metals (or anodes) either on or adjacent to your boat.  You can, and should, continue to use zinc anodes elsewhere on your boat while upgrading your Side-Power (Sleipner) thruster to these new, technically superior aluminum anodes.

Side-Power (Sleipner)

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