If the aluminium and stainless are submerged the aluminium will corrode in preference to the stainless. You could, of course, fit an anode to protect them both.
Even if not submerged, it is likely that water will get between the two unless some sort of gasket is used.
Originally Posted by IanE
I'm about to embark on fitting a Garelick Transom bracket to support 65Kgs of
My current plan is to "sandwich" the transom in stainless steel plates.
1) Does anyone know where I could obtain such plates (30cm X 20cm X [2.5mm?] ?
2) Any comments on the idea - are there any corrosion/electrolysis implications , the bracket is aluminium alloy.