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Originally Posted by EngNate On the commercial boat on which I was the Engineer, all the zincs were cast with tabs which were welded on. Replacing, they were cut off, ground, and new ones welded on. There was a lot of zinc, around 250 lbs of it on a 106 ft, 160 gross-tons hull. You really want to consult a steel boat builder to determine how much zinc you'll need. You might also get useful information from some of the zinc manufacturers, Sea-Shield, Reliance, Canada Metals, others. Also check out the electronic protection systems at Electro-Guard, corrosion and cathodic protection specialists for boats, yachts and small ships. . These units get more and more attractive as the price of metals, including zinc, goes up. |
Great idea about the cathodic protection system, Nate! I wasn't even thinking that way. Thanks.
I'm checking into it now for the planned boat. You're right about the increasing cost of the metals. Although this unit is bound to up my power budget a little bit, it seems like it will save $$ in the long run over the (extended) life of the hull.
Thanks