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The article indicates that the graphene paint is water permeable, and graphene is highly conductive. I can't see the draw unless you want wet core and massive galvanic corrosion.
 

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Multihull,

Thanks for the catch. I initially read it as the chemical treatment only being impervious against acids/corrosives/ect. But on second reading I think you are correct and the chemical treatment is also impermeable against water.

I this is correct then I think there could be a real application for the marine industry.

Like I said before however I would still be worried about conductivity. Graphene is a much better conductor than copper (in its elemental form), in fact it is the best room temprature conductor know to man. Controlling this will be a serious issue not that it isn't solvable, but it raises some real concerns to me.

The copper oxide used in bottom paint while made from copper is a semi-conductor with much lower conductivity than elemental copper. Even so it has been known to cause problems with aluminium hulls and running gear.


Graphene also has the problem that it is at the very high end of the galvanic chart. Which means that it will create a high potential galvanic circuit with just about anything except for titanium and carbon fiber. Even with stainless steel there is enough of a potential difference to cause galvanic issues.


Again all of these properties may be overcome with proper engineering, build, and application characteristics, but in a world where we still can't get boat builders to mount deck hardware without exposing core I have doubts that it will work.


Edit: it actually may be an easy application in a solid carbon fiber hull with titanium fittings. Since they all have the same (roughly) galvanic potential). This would result in a boat that just needs a few things properly protected (engines... And don't think about aluminium water tanks). But otherwise may not be such a difficult fit.
 
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