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post #5 of Old 01-06-2013
noelex77
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Re: best way to mount Aluminium to steel underwater

IMHO if the body of this light is aluminium you cannot use it on a steel hull.
There will be electrical contact between the aluminium and steel via the fastenings.
This will result in rapid galvanic corrosion of the aluminium.

Please don't do it.
I honestly think your boat will sink in about 6 months if you do.
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