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Can I protect an aluminum-hulled boat with magnesium anodes in salt water?

April 26, 2017aluminum-hulled anodes boat Magnesium protect Salt water

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Can I protect an aluminum-hulled boat with magnesium anodes in salt water?

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ANSWER 9: Not under any circumstance. Aluminum is protected within the following range of -900mV to -1150mV. and a magnesium anode in an open circuit has a reading of -1500mV. This can put the aluminum in a state of “overprotection” resulting in a chemical attack of the aluminum due to the PH balance of the cathode (the aluminium hull).