symboom - 20-4-2011 at 10:19
i am tiring to find alternatives from expensive or toxic anodes (as cobalt containing and lead dioxide) and also i said computer hard drives because
through research and dissolving a hard drive platter in Aqua Regia and precipitating out a little bit of platinum they do in fact have a coating of
platinum its not much
a cheap source of a platinum anode
http://www.platinum.matthey.com/applications/industrial-appl...
excerpt
All disks contain platinum
Information storage requirements continue to expand at rapid rates, fuelled by the growing use of computers for video and audio applications. Today,
all hard disks contain platinum in their magnetic layers, compared with around 50 per cent in 1997. The proportion of platinum in the magnetic alloy
has been increasing steadily over time, from less than 10 per cent five years ago to over 35 per cent, on average, today.
[Edited on 20-4-2011 by symboom]
[Edited on 20-4-2011 by symboom]
Bot0nist - 20-4-2011 at 10:46
'Cheap' is relative to your income. americanpyrosupply has a nice set of platinum coated titanium mesh anodes for $80 usd. Seems worth it to me for a
quality anode that will produce and hold up. Unlike, say, some cheap platinum jewelry.
symboom - 20-4-2011 at 11:50
actually that's where i got my platinum anode from. they work great. yes buying is easier but i do have a failed hard drive might as well put it to
use. and its pretty easy to find broken computer parts also. i more do it just to see if it works
a bit off topic there are also useful for splitting magnesium sulfate
into magnesium hydroxide and sulfuric acid using a salt bridge (MgSO4)
[Edited on 20-4-2011 by symboom]
Neil - 24-4-2011 at 18:23
Platters are coated with a Co-Cr-Pt alloy which is around 45% Pt
The layer on a platter is in the realm of 30nm, I could be wrong but it seems like you'd spend more on acids then you'd get in platinum based on the
numbers which came from the link below.
http://www.extremetech.com/article2/0,2845,1938479,00.asp
I've gotten free platinum wires by keeping my eyes open for when el-cheapo electrophoresis chambers get tossed in the trash.