Electrolysis deck gear carbon G10 Aluminium

Discussion in 'Sailboats' started by NHRC, Aug 10, 2016.

  1. NHRC
    Joined: Jan 2014
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    Location: Lymington

    NHRC Junior Member

    Hi guys

    So I am in discussions with a project manager who insists that it is common practice to bolt Aluminium winches to Carbon boats without an insulation layer of G10.

    Anyone out there boat building at a reputable composite boat yard willing to advise on what they see as good practice?

    Anyone from Green Marine? Ex-Goetz? Baltic? Persico? NEB? McConnaghies etc???
  2. Ad Hoc
    Joined: Oct 2008
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    Location: Japan

    Ad Hoc Naval Architect

    carbon eats ally...don't do it!!


    A potential greater than 50mV is not advised and greater than 250mV is a killer
  3. PAR
    Joined: Nov 2003
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    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Yeah, I don't know of any manufacture that's bolting aluminum to anything so noble. The aluminum would literally break down as you stare at it.
  4. NHRC
    Joined: Jan 2014
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    Location: Lymington

    NHRC Junior Member

    I believe it was a labour saving cost cutting measure.

    Backfired obviously as they are now rectifying the issue under warranty.
  5. CDK
    Joined: Aug 2007
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    Location: Adriatic sea

    CDK retired engineer

    The good news is: graphite boats do not exist!
    "Carbon" boats are made from plastic with embedded carbon fiber reinforcement. The surface doesn't conduct, so there is no electrolysis if bolt holes are sealed.

  6. nota
    Joined: Sep 2012
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    Location: miami

    nota Junior Member

    I would NOT on anything like a high loaded hole you hope are sealed
    as it is going to work and ware on the thru deck and soon there is no seal
    and water will get in the smallest gap or crack
    even if the crack is not enough to leak it is enough to cause corrosion
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