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For copper: Epoxy or solder?

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Unread postAuthor: jackssmirkingrevenge » Wed Nov 07, 2007 11:53 pm

_Fnord wrote:I would think solder bonds better than epoxy, because it actually "soaks in" to the metal. Marine epoxy will work well but I don't think it would be good for larger stuff. Ask Jack.


I find epoxy works very well for PVC at 400 psi, and it bonds even better to metal (which has been suitably prepared by cleaning and abrasion) - I would go for this option, slightly messier than solder but there's no heating involved.
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Unread postAuthor: LikimysCrotchus5 » Thu Nov 08, 2007 12:19 am

why would you take PVC to 400 psi? i wouldnt even if it says it can take it :)
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4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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Unread postAuthor: jackssmirkingrevenge » Thu Nov 08, 2007 12:31 am

LikimysCrotchus5 wrote:why would you take PVC to 400 psi? i wouldnt even if it says it can take it :)


Because it can take it :D and because for a given quantity of air, low volume and high pressure is better than high volume low pressure - have a look here for some compelling statistics on the matter ;)
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Unread postAuthor: BigGrib » Thu Nov 08, 2007 12:35 am

Well basically you are comparing apples and oranges even though both soldering and epoxy achieve the same thing (bonding two pieces of material) each has it's own set of pro's and con's soldering while being extremely strong to the point of being stronger than the original metal need heat and solder to work with but it is cleaner. epoxy which true once cures is stronger than the original material the bond can be broken easier and is messier. For what it's worth i'd go and spend the extra 15 to 20 bucks for a torch kit and solder that thing up. You're gonna have a better end result it will look cleaner and is gonna be stronger than epoxy
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Yea, that's definitely going to get you at least a tazer.

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Unread postAuthor: Hawkeye » Thu Nov 08, 2007 10:02 am

Except Just for Copper is not Epoxy. It's an acrylic or polycrylic.
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