[Alberg30] Details on Mast Beam Repair fitting

[R.C. Alley]

As I think I have said before.... Perfection is the enemy of good enough.
----- Original Message -----
From: "Gord Laco" <gord at transatmarine.com>
To: <public-list at alberg30.org>
Sent: Friday, June 15, 2001 10:05 AM
Subject: Re: [Alberg30] Details on Mast Beam Repair fitting


> 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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