Hi Jim,
It looked to be the copper side that failed. I had cleaned both surfaces
with isopropyl before using the epoxy; perhaps I needed to wait a bit long
for the iso to clear up.
I really not have had any great results trying to use epoxy (Bob Smith
brand, in this case) with plastic surfaces; but most of my epoxy experience
is with amateur rocketry, which uses material like phenolic and woods.
Joshua Thomas
On Wed, May 18, 2022 at 8:14 PM Lux, Jim <jim@xxxxxxxxxxxxx> wrote:
> On 5/18/22 4:43 PM, Joshua Thomas wrote:
> > Hello Mads,
> >
> > Thank you for reminding me of your site, I had used it before as a
> > reference. I have been sticking to the â??rulesâ?? of not putting any holes
> in
> > the secondary, but I see youâ??ve gotten away with it on occasion. I might
> > try using a nylon bolt threaded from the inside to outside as a place to
> > terminate the bottom of the coil.
> >
> > On that note, do you have any recommendations for adhesives for
> > plastic-plastic (pvc) and metal-plastic bonding? The epoxy I used to
> hold a
> > piece of copper to a pvc pipe was a complete failure.
>
> Which side of the joint failed? The copper or the PVC? You have to be
> scrupulously clean.
>
> I use silicone sealer (like for tubs or aquariums) for a general purpose
> "glue" - it sticks to most stuff pretty well. It's not good
> structurally, but for something that's not seeing a lot of loads it
> works ok - good epoxy joints are stronger than the material in some cases.
>
>
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--
Joshua Thomas
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