Is It Necessary to Haul Out Each Year To Let the Boat "Dry Out"

[Kenomac]

Originally Posted by noelex 77

Yes, Boatpoker is correct. For this sort of application aluminium anodes are the best choice. Unfortunately, you really need to change them all.

The problem with zinc anodes in fresh water is that they develop a coating that acts as an insulator and stops them working. If you go back to salt water the coating tends to remain. You can sand and scrape the anodes exposing the uncoated zinc and get them back to working correctly in salt but if you go back to fresh water it will reform. It is not possile to keep zinc anodes working in fresh water the coating forms reasonably quickly, although the need for anodes is less in fresh water.

Aluminium is ideal for salt and brackish water and is acceptable for fresh (magnesium is ideal).

Thanks.

I'll be diving under the boat this coming Friday to check everything out.