Hi, I am trying to find a good adheasive to bond 316 stainless hardpoints to a carbon epoxy skin.
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[li]The hardpoint will see compressive and shear loads.[/li][li]The environment will expose the structure to salt water[/li][/ol]Thanks in advance
Have you any temperature requirements or production speed requirements, etc? Im guessing its marine is it and low cost required?
http://www.vikingtapes.co.uk/c-365-epoxy-formulation-2-part-adhesive.aspx
Check the australian distributor of 3M for DP410 or 460 for example. Not the cheapest but they are v.good adhesives.
Also, Huntsman Araldite, check out similar products available here: http://www.freemansupply.com/EpoxyAdhesives.htm
Thanks for your reply, temperature should be 0-70Celcius, your following guesses are both correct,
From what I have read the surface preperation is critical and will require sandblasting or abrading back the oxide layer. This is where I suspect the cost will be.
The component is to be a top hat bush where a bolt will pass through, I am now considering a high performance plastic - maybe 30% glass filled nylon.
You are only bonding to the skin? Not good for interlaminar shear. Why not use a classic insert, either potted or two-piece? Is this a sandwich or solid?
If you do not like surface prep, use a methacrylate. For instance the Huntsman 2000 series methacrylates, or the ITW plexus glues. (MA300 / 310 for high stffness, or MA420/422/425 for higher elongation. Use their PC120 primer for the stainless or alu. It is a washprimer, which evaporates in 1 minute, so hardly any time lost.
3M dp490 if cost is not an issue. It is one of the strongest adhesives that we have ever used for bonding inserts and the like to carbon. Make sure that both parts to be bonded are well prepared and de-greased with acetone.
Bead blasting with glass beads is always a good method for keying metal parts to be bonded.
If cost is more of a concern I would personally use ITW Plexus ma310.