Galvanic corrosion on carbon fiber yachts

Question

Galvanic corrosion on carbon fiber yachts

Mr LGM (Marine/Ocean)

(OP)

20 May 21 13:11

Hi there,

I would like to find out if there are any preventative measures for galvanic corrosion on carbon fiber vessels. More specifically, it seems that carbon fiber, when in contact with aluminium for instance, could cause galvanic corrosion. A follow-up question would then be: Can carbon fiber cause stainless screws/bolts to corrode as well, assuming both materials are exposed to seawater?

Cheers

TugboatEng (Marine/Ocean) · Answer 1 · 2021-05-20 14:21:42

Crevice corrosion will be a larger problem as it's already an issue in non-conductive substrates such as fiberglass.

https://www.google.com/url?sa=t&source=web&...

This one is probably a bit more accurate:

https://store.nace.org/marine-crevice-corrosion-of...

Mr LGM (Marine/Ocean) · Answer 2 · 2021-05-20 14:36:20

RE: Galvanic corrosion on carbon fiber yachts

Mr LGM (Marine/Ocean)

(OP)

20 May 21 14:36

Thanks

EdStainless (Materials) · Answer 3 · 2021-05-20 16:02:16

Use Ti with C fiber like they do in aerospace.
Coupled to Al is a guaranteed disaster, and common SS alloys will not stand a chance either.
The only real options to mate with CF in wet environments are high alloy SS (6% Mo superaustenitic or superduplex) or Ti alloys.

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P.E. Metallurgy, consulting work welcomed

Compositepro (Chemical) · Answer 4 · 2021-05-20 16:54:03

Carbon fiber must not contact most metals in wet environments. Insulating washers and bushings will work.

Mr LGM (Marine/Ocean) · Answer 5 · 2021-05-21 06:10:48

RE: Galvanic corrosion on carbon fiber yachts

Mr LGM (Marine/Ocean)

(OP)

21 May 21 06:10

Thanks, I appreciate the feedback

TugboatEng (Marine/Ocean) · Answer 6 · 2021-05-21 06:28:26

I use Teadit 24BB gasket tape between any flanged connections of similar or dissimilar materials on my boats.

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Galvanic corrosion on carbon fiber yachts