Highndry
Well-Known Member
Why use Monel rivets rather than stainless for fitting stuff to aluminium masts? Don't both types need to be seated in Duralac? If Monel is the way to go, what should I be paying for 10 x 1/4in x 1/2in rivets?
Monel rivets?
- Thread starter Highndry
- Start date
Davegriff
Well-Known Member
deleted
Pay as little as you can find.......
edit: I'm wrong again!!!
Pay as little as you can find.......
edit: I'm wrong again!!!
Last edited:
PCUK
Well-Known Member
Try Skycraft (light aircraft parts) Fraction of the price of marine suppliers. www.sky-craft.co.uk/
Last edited:
Davegriff
Well-Known Member
You posted while I was removing my wrong answer (to avoid creating ay confusion) sorry.
Highndry
Well-Known Member
Many thanks for the heads up, they only go to 3/16" but I then found these people http://www.inox.ie/acatalog/Rivets.html by searching for nickel copper alloy rivets.
PCUK
Well-Known Member
OK Dave, now edited mine!
merlin3688
Well-Known Member
Monel rivets do not need Duralac, stainless ones do, only use Monel on alloy masts.
VicS
Well-Known Member
Monel is a copper nickel alloy. Its position in the galvanic series is close to stainless steel. When used in aluminium it will need Duralac, or an alternative, just as much as stainless steel does and for the same reason.
Highndry
Well-Known Member
Well, I've ordered Monel and a tube of Duralac. Thanks to everyone for the advice.
merlin3688
Well-Known Member
Looks lkie I may be wrong, found this thread from a few years ago!
http://www.ybw.com/forums/showthrea...l-recommended-for-rivets-in-an-aluminium-mast
I am sure in all my years at Sailspar we did not use Duralac, in the good old days we used to fit out 5 masts at a time, can't ever remember using anything on the rivets. I agree about stainless which is why stainless pop rivets should not be used. I remember rig checking many yachts that had a kicker fitting or gooseneck fitting made from stainless, little was put under the fitting and when removed all sorts of problems were going on with the alloy section!
I guess reading the thread probably best to use Duralac although I'm sure someone else will have another opinion!
bluerm166
Well-Known Member
It appears that Z Spars do not find it necessary to use Duralac as a matter of standard practice to separate Monel rivets and the particular alloy of aluminium used for their masts.This may be because,as has been said,there is not a constant electroyte present.It may also be because there is a contradiction in making the desirable close grip between the rivet and the mast section and introducing a slippery medium between the two as the rivet is compressed.The duralac is in any case likely to be expelled at the point of closest fit.Stainless fittings are another matter.
