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Which rivet material?
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L123456 View Drop Down
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    Posted: 09 Aug 21 at 11:51am
What pop rivets do I need to attach stainless steel fittings to aluminium masts?

Do I need monel rivets?
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Andymac View Drop Down
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Posts: 852 		Post Options Post Options   Quote Andymac Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 21 at 12:21pm
Depends really. If it is fitting with a high stress load such as shroud attachments, kicker tang etc then Nomel is a must. If it is a low stress fitting ie burgee holder then alloy would be adequate. If in doubt then default to Nomel. NB some plastic fittings could break before the mandrel of a nomel rivet such as HA 262 fairlead used as Laser/ILCA! Outhaul fairlead on boom.
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Posts: 500 		Post Options Post Options   Quote L123456 Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 21 at 12:33pm
Originally posted by Andymac

Depends really. If it is fitting with a high stress load such as shroud attachments, kicker tang etc then Nomel is a must. If it is a low stress fitting ie burgee holder then alloy would be adequate. If in doubt then default to Nomel. NB some plastic fittings could break before the mandrel of a nomel rivet such as HA 262 fairlead used as Laser/ILCA! Outhaul fairlead on boom.

Nomel?

Is that a typo or is that different to monel?

Monel is Nickel Copper Alloy
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Sussex Lad View Drop Down
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Just as a suggestion I use Duralac liberally smeared between the surfaces before riveting. It inhibits electrolysis.


DESCRIPTION
Duralac is a chromate containing jointing compound designed to inhibit electrolytic decomposition between dissimilar metals – often called galvanic corrosion. It is a single pack, air setting product. Used correctly, Duralac prevents anodic decomposition.



Edited by Sussex Lad - 09 Aug 21 at 1:26pm
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Originally posted by Sussex Lad

Just as a suggestion I use Duralac liberally smeared between the surfaces before riveting. It inhibits electrolysis.


DESCRIPTION
Duralac is a chromate containing jointing compound designed to inhibit electrolytic decomposition between dissimilar metals – often called galvanic corrosion. It is a single pack, air setting product. Used correctly, Duralac prevents anodic decomposition.


between stainless and aluminium it is necessary to use a prevention compound like you suggest. These two are far apart on the galvanic table - https://www.qsl.net/n9zia/electrochemical.html and there will be issues with the ali being corroded if you don't.
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Posts: 500 		Post Options Post Options   Quote L123456 Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 21 at 2:48pm
Originally posted by Sussex Lad

Just as a suggestion I use Duralac liberally smeared between the surfaces before riveting. It inhibits electrolysis.<div ="md-9="" sm-12"="" style="-sizing: border-; width: 555px; : left; color: rgb64, 64, 64; font-family: " sans", arial, sans-serif; font-size: 13px; : rgb255, 255, 255; -webkit-font-smoothing: antialiased !imant;"><h1 style="-sizing: border-; -webkit-font-smoothing: subpixel-antialiased; margin-right: 0px; margin-bottom: 15px; margin-left: 0px; color: rgb76, 162, 82; font-size: 24px; font-family: "work sans", sans-serif;"><span itemprop="name" style="-sizing: border-; -webkit-font-smoothing: antialiased !imant; font-size: 30px; color: rgb51, 51, 51; font-family: "Work sans"; width: 499.5px; display: block;"></span><span itemprop="name" style="-sizing: border-; -webkit-font-smoothing: antialiased !imant; font-size: 30px; color: rgb51, 51, 51; font-family: "Work sans"; width: 499.5px; display: block;"><b style="-sizing: border-; color: rgb64, 64, 64; font-family: " sans", arial, sans-serif; font-size: 13px; -webkit-font-smoothing: antialiased !imant;">DESCRIPTION<br style="-sizing: border-; -webkit-font-smoothing: subpixel-antialiased; color: rgb64, 64, 64; font-family: " sans", arial, sans-serif; font-size: 13px; font-weight: 400;"><span style="-sizing: border-; color: rgb64, 64, 64; font-family: " sans", arial, sans-serif; font-size: 13px; font-weight: 400; line-height: 16px; -webkit-font-smoothing: antialiased !imant;">Duralac is a chromate containing jointing compound designed to inhibit electrolytic decomposition between dissimilar metals – often called galvanic corrosion. It is a single pack, air setting product. Used correctly, </span><span style="-sizing: border-; color: rgb64, 64, 64; font-family: " sans", arial, sans-serif; font-size: 13px; font-weight: 400; line-height: 16px; -webkit-font-smoothing: antialiased !imant;">Duralac prevents anodic decomposition.</span></span></h1>


Duralac is a must.
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Posts: 382 		Post Options Post Options   Quote Oatsandbeans Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 21 at 5:09pm
Duralac -full of CrVI -not flavour of the month environmentally , everyone is getting rid of it!
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Posts: 3420 		Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 21 at 5:56pm
https://www.marshfasteners.com/can-stainless-steel-and-aluminum-be-used-together/
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Posts: 1151 		Post Options Post Options   Quote 2547 Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 21 at 6:43pm
Originally posted by Oatsandbeans

Duralac -full of CrVI -not flavour of the month environmentally , everyone is getting rid of it!

I believe it’s banned in the US. TechGel is the now preferred but it doesn’t set and so is less effective. 
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Posts: 852 		Post Options Post Options   Quote Andymac Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 21 at 7:33pm
Doh! Nomel = Monel. Typo x 2! Thanks
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