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4hv.org :: Forums :: Chemistry
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DIY magnetic solder?

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Conundrum
Mon Dec 27 2010, 08:04PM Print
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
Hi all.

Seems that this Link2 might be a way to make that magnetic solder being discussed at the moment.
Base material seems to be SnAgCu, so easy to get hold of as feedstock for solder rework baths.
Combine with the prepared iron under inert atmosphere (easy enough, He or N will work) and voila.

Managed to get some oxalic acid as a whitening agent mixed with citric acid..


Sound possible?
-A
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Pinky's Brain
Tue Dec 28 2010, 08:58AM
Pinky's Brain Registered Member #2901 Joined: Thu Jun 03 2010, 01:25PM
Location:
Posts: 837
They didn't use iron powder that fine in the paper ... what they did use was -325 mesh iron powder, which is pretty cheap to buy.

It sounds possible, it also sounds like a needless complication. Introducing an extra factor (oxidation) to make your solder not work.
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Conundrum
Tue Dec 28 2010, 02:06PM
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
hmm, ebay?
looks like there may be a missing step, iron oxidises very quickly.

-A
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Pinky's Brain
Tue Dec 28 2010, 02:33PM
Pinky's Brain Registered Member #2901 Joined: Thu Jun 03 2010, 01:25PM
Location:
Posts: 837
I doubt it matters much when stored airtight.

As I said in the other thread, half a kilo for 16$ here.

PS. the stuff is used as a food additive, that's why it's so cheap.
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Conundrum
Thu Dec 30 2010, 04:36PM
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
Heh.. 300 mesh. Sound fine enough?

I did have a very intriguing idea about this, PM me for the details smile

-A

"Bother" said Pooh, as he discovered that graphite powder really annoys laptops...
1293726966 96 FT104560 Iron
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