Oh I forgot to add that is $30 for 12oz can. They also sell just tins 150ml
for $35 ish, but I prefer spray for primer as it gives a better finish.
On Thu, Oct 18, 2018, 6:28 PM Tesla <tesla@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
> Matt,
>
> What is the cost of a tin, last time I looked at a similar paint
> (although probably a silver, not nickel solution) 5mL was around £35
>
> In my mind, that equated to ~£20 per paint brush full :)
>
> Derek
>
> On 18/10/2018 18:36, Matthew Sweeney wrote:
> > Yeah the tape method is totally not going to work at 300KV+ the corona
> > losses are just too high and as you mention burnishing will deform the
> > underlying polystyrene.
> >
> > The MG chemicals Nickel conductive spray has ridiculously low resistence
> > something like less than 0.005 Ohms/cm and dries to a hard, smooth
> finish.
> > I believe it is also specifically design to spray on plastics, wood etc.
> >
> >
> https://www.mgchemicals.com/products/emi-and-rfi-shielding/acrylic-conductive-coatings-original-series/super-shield-nickel-841
> >
> >
> >
> >
> >
> > On Thu, Oct 18, 2018, 9:25 AM Derek, Extreme Electronics <
> > tesla@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
> >
> >> Sorry Matt, I blame blurry eyes from posting too early...
> >>
> >> I've used aluminium tape a lot, but I'm never happy with the
> >> result, especially over polystyrene. To get the strength to be able to
> >> burnish the alu you need to make a hard shell of something around the
> >> poly former (I've tied many coatings) sanded smooth. The results is
> >> either too thin and deforms when burnishing or too thick and has lost
> >> the surface shape after sanding.
> >>
> >> Conductive paint works well doesn't require burnishing and if it
> is
> >> sprayed the surface finish is even better, although the conductivity
> >> will be less, maybe loads of layers will help. For protective rings it
> >> would be ideal (although black). You would need to be careful about
> >> corona or discharge as it is easily spark eroded.
> >>
> >> I love the idea of copper plating, both aesthetically and to
> >> increase conductivity. It also may protect the surface from corona
> >> etching too. Please post your results (and methods)
> >>
> >> Derek
> >>
> >> On 18/10/2018 02:04, Matthew Sweeney wrote:
> >>> Hi Derek, it was me who actually asked the original question :)
> >>>
> >>> I planned on using MG Chemicals Nickle conductive primer spray, and
> then
> >>> brush plating with copper. The polystyrene forms are nice because you
> can
> >>> fill any small dents with sandable filler or even hot glue.
> >>>
> >>> My first attempt at making copper rings failed because although I made
> a
> >>> 'perfect' circle I could not get a clean joint. If I had a welder,
> >> grinder,
> >>> and a place to use them I might be able to do better.
> >>>
> >>> In the meantime this seems a quick and easy method I can do with few
> >> tools
> >>> in limited space (fan with window open when needed of course).
> >>>
> >>> Thanks,
> >>>
> >>> Matt
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>> On Tue, Oct 16, 2018, 8:01 PM Tesla <tesla@xxxxxxxxxxxxxxxxxxxxxxxx>
> >> wrote:
> >>>> Antonio,
> >>>>
> >>>> I've tried to make spheres with conductive paint
> >>>> https://www.bareconductive.com/. You need a very good surface for the
> >>>> paint to adhere and to give a smooth end finish. I haven't tried spray
> >>>> painting, but I'm told it is possible.
> >>>>
> >>>> I'd start with a primer on to the polystyrene, to seal, give
> you a
> >>>> good surface finish and help the conductive paint to adhere.
> >>>>
> >>>> I found that diluting the conductive paint 50/50 gave the best
> >>>> finish on to a smooth plastic surface although with a higher
> resistance
> >>>> than 100% paint.
> >>>>
> >>>> I would love to see your results..
> >>>>
> >>>> Derek
> >>>>
> >>>> On 15/10/2018 19:35, Antonio Queiroz wrote:
> >>>>> Em 15/10/2018 11:39, Matthew Sweeney escreveu:
> >>>>>> As title suggests, I'm planning as follows:
> >>>>>>
> >>>>>> 1. Various sized cheap polystyrene rings (e.g 4x1 inch)
> >>>>>> 2. Prime with nickle or graphite spray paint.
> >>>>>> 3. Brush copper plate.
> >>>>>> 4. Polish/Buff
> >>>>>>
> >>>>>> The purpose is for primary charge induction and trap terminals in a
> >>>>>> Kelvin
> >>>>>> thunderstom machine, and for investigating constuction of cheap
> Corona
> >>>>>> rings.
> >>>>>>
> >>>>>> Has anyone tried this method previously, or have any
> >>>>>> suggestions/recommendations? Note this is intended as a cheap method
> >>>>>> even
> >>>>>> If the results are not 'perfect'.
> >>>>>>
> >>>>> Adhesive aluminum tape is good for this purpose. No need for any
> >>>>> priming and the result is quite good.
> >>>>>
> >>>>> Antonio Carlos M. de Queiroz
> >>>>> _______________________________________________
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