chemrox
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cheap copper electrodes
cheap copper electrodes are available at American Science & Surplus. They sell a 53/4" X 3/4" X 0.41" strip for $2.
sciplus.com
"When you let the dumbasses vote you end up with populism followed by autocracy and getting back is a bitch." Plato (sort of)
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chloric1
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Not exactly cheap but I'll make note of that.
Fellow molecular manipulator
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kclo4
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Whats so great about copper electrodes vs copper pipes?
Oh yeah.. and Happy mole day 
[Edited on 23-10-2008 by kclo4]
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crazyboy
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| Quote: | Originally posted by kclo4
Whats so great about copper electrodes vs copper pipes?
Oh yeah.. and Happy mole day
[Edited on 23-10-2008 by kclo4] |
Yeah I just use a copper pipe I cut open and hammered flat.
My chem teacher gave us chips and guacaMOLE (no joke.)
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kclo4
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Interesting! I never thought of Hammering them out, I have just always used them as is.
What exactly are the benefits for them being into a flat sheet? I assume surface area or something like that, but I don't know if that really matters
very much.
erm... I guess if your cell structurally "favors" a certain shape it would matter.
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crazyboy
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I hammer it out because if I use it for several runs I can easily clean it with a bench grinder plus it makes it easier to drill a small hole in it
where I can put a wire.
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smuv
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I think considering the thickness the price is reasonable, not wonderful. At any rate, nice of you to share.
@ crazyboy, if you have a torch, you would probably get more consistent results if you just soldered the wire to the electrode.
"Titanium tetrachloride…You sly temptress." --Walter Bishop
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watson.fawkes
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Using 559 lb/cu-ft as the density for copper, it comes out to $38.76/lb. That's downright expensive, unless you need just one or two and have no
better source. I get surplus stock copper in my area for $3.50/lb.
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The_Davster
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Copper electrical wire is supposedly very pure for efficient conduction reasons. There is enough 1-2mm diameter wire lying around in construction
site junkheaps that I have never bought.
A flat electrode is preferable if one is doing analytical work, as it will have a uniform current density over the surface when the other electrode is
beside it. For uniform current density on a cylinder one needs another cylindrical electrode around it, and of course spacing must be precise.
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grndpndr
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Not to defend American science and Surplus but some of thier(limited) glassware is reasonable/good range of useful surplus electronics and customer
service fine. Instead of returning a broken 500ml broken seperatory funnel, it was simply replaced with a phone call.Chinese,but 'adequate'.
Copper pipe would seems the material of choice partcularly since scrounging yields far more useful things than one would first imagine.
[Edited on 30-10-2008 by grndpndr]
[Edited on 30-10-2008 by grndpndr]
[Edited on 30-10-2008 by grndpndr]
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