[Alberg30] Details on Mast Beam Repair fitting

[Gord Laco]

I agree with George... all our masts have stainless in contact with aluminum
(we still build them that way here)... sure, Skene's Elements of Yacht
Design might not recomend it but it is a common practice.  Trouble starts in
the dark damp places that don't dry out: like bilges etc. Mmmmm, or a piece
of underdeck structure with a bit of seepage feeding water into it.  Nah,
probably OK.

Gord
  A30 KC426 Surprise
----- Original Message -----
From: George Dinwiddie <gdinwiddie at min.net>
To: <public-list at alberg30.org>
Sent: Friday, June 15, 2001 9:35 AM
Subject: Re: [Alberg30] Details on Mast Beam Repair fitting


> Well, there has to be some moisture (or something equivalent) for the
> ion transfer that results in the corrosion.  I think that if you keep
> the beam dry, you won't have any significant problems.  Painting it
> will also help, as well as make it look better.
>
>  - George
>
> > R.C. Alley said:
> >
> > I have to take issue with Mike on this one; corrosion due to dissimilar
> > metals will occur any time the metals are in contact; the corrosion will
> > simply happen more slowly in a dry(er) environment.  There are several
> > things you can do, none of them good--like use nylon washers and
bushings to
> > separate the metals, or use a corrosion inhibitor.  In any case, the
> > aluminum will corrode visibly first.  The stainless will also
corrode--but
> > you will have trouble seeing it.
>
> --
>  ----------------------------------------------------------------------
>   George Dinwiddie                             gdinwiddie at alberg30.org
>   The gods do not deduct from man's allotted span those hours spent in
>   sailing.                                    http://www.Alberg30.org/
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