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Old 11-08-2018, 02:24 PM   #14
foggysail
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City: Ashland, MA
Vessel Model: 1990 Silverton 40 aftcabin
Join Date: Jul 2016
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Quote:
Originally Posted by gsholz View Post
Each hull material has a recommended voltage for optimum protection. Measuring with a reference anode will determine if you are in the recommended range. Common problems with over protection are paint lifting, paint blisters, halos around zincs. On wooden boats it can actually destroy the wood around fasteners.
Nonsense! There is no recommended half cell voltage recommended for hull material unless the hull is metal. There are 3 common anode materials, zinc, aluminum and magnesium used for boats. Magnesium will have higher voltages when tested with a half cell followed by aluminum and zinc and is recommended only for fresh water.

OH, check out Wooden Boat forum and see what they use for anodes....most use nothing unless the hull is enclosed.

Have you ever used a half cell?
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