On the subject of hard wearing surfaces as was brought a little while ago in Sylvester Stone's i think interest in kevlar for hull materials, i remembered that i usec dynel for the tips of rudder blades on Sidecar. Very cheap, very tough and hard to sand. Useful stuff. I realize now, that i could have used some on the bows, where i had many scrapes. It would be useful there. I think it is probably relatively heavy and not strong so si good for entire hull, just hard wear areas.

--------------------------------------------
On Wed, 27/6/18, 'Peter Southwood' peter.southwood@telkomsa.net [harryproa] <harryproa@yahoogroups.com.au> wrote:

Subject: RE: : Re: : Re: [harryproa] Hard Points in foam sandwich panels
To: harryproa@yahoogroups.com.au
Received: Wednesday, 27 June, 2018, 8:00 PM


 









Depends on the grade
of stainless. The good stuff costs a lot more because there
is much more nickel and chrome in it.. If money is no object
, copper/nickel/iron (CuNiFe) alloys are anti-foulng, very
corrosion resistant, and strong. Also very expensive, and
rather heavy.  You get what you pay for. Cheers,
Peter
 From: harryproa@yahoogroups.com.au
[mailto:harryproa@yahoogroups.com.au]
Sent: 27 June 2018 13:52
To: harryproa@yahoogroups.com.au
Subject: Re:: Re: : Re: [harryproa] Hard
Points in foam sandwich panels    Some years ago there were
people using copper foil on the undersurface of the hull. I
heard some boats had lasted over 10 years without being
slipped and yet the hull was still clean.  This would of course be
considerably cheaper than thicknesses of copper plate
adhered to the hull, and I guess its possible to apply
copper foil much as vinyl wrap is done, perhaps it could be
electroplated onto some materials. Foils are typically
0.006"
 I think
stainless would be more problematic, stainless is generally
avoided for submerged components of boats because it needs
an amount of oxygen in its surrounds.  Virus-free. www.avg.com

 









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