Zinc to protect bronze parts? - SailNet Community

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Old 05-27-2008
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Zinc to protect bronze parts?

Is there any point in attaching a zinc to underwater bronze parts (in this case large bronze fork that holds the rudder) to protect it from any sort of galvanic corrosion? There is no electric connection between this part and the rest of the boat systems (the engine etc).
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Old 05-27-2008
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If it is isolated, it doesn't really need a zinc. Do you attach zincs to your through hulls?? No, didn't think so.
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Old 05-27-2008
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Any metal part immersed in an electrolyte (like seawater) is liable to suffer corrosion. Does this mean your particular part needs protection from a zinc anode? No, but it bears watching.

BTW, at least one model of Delphia boats do actually have zincs on some of their thru-hulls.
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Old 05-27-2008
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ok, so it probably won't do much but it may not hurt either. That's what I thought.
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