[Noisebridge-discuss] soldering copper sheet metal
musti at wlan-si.net
Thu Oct 29 20:26:08 UTC 2015
depends on what you are trying to do, but maybe just use spot welding?
You might as well try Aluminum soldering flux, which enables to solder
it like a charm, if you ahve the right thin it will . This flux smells
really really bad.
On 29.10.2015 21:18, jim wrote:
> Nothing's working. I talked to two different
> experts, one a plumber the other a bike mechanic.
> both are surprised and both guess that the copper
> sheets (12" wide copper rolls I bought from R. H.
> Leahy in SF) must have a tiny amount of oil that's
> embedded a couple or atom's distance into the
> surface of the copper.
> I've tried various fluxes, washed 'em with
> borax, lye, sodium carbonate (all high base), and
> with alcohol, paint thinner, acetone, and muriatic
> acid. I've scoured 'em with fine and with coarse
> sand paper, by hand and with an electric hand
> My heat sources have been a propane torch and
> also a 950 degree soldering iron. I've used tin-
> lead and also silver solder.
> The result is that the solder burns and
> browns with what seems like little disks from
> popped bubbles and all solders bead up and roll
> Somebodies know how to work with sheet copper
> to make rain gutters, art, etc.
> I've looked into copper glues, and reviewers
> warn that some products are of poor quality, other
> products work but cannot withstand mechanical
> I'm gonna try adhesive copper tape, maybe
> double it up if I need the strength.
> On 10/25/2015 11:58 PM, Cere Mona Davis wrote:
>> There is a special kind of flux for solding to copper. . Seen it at
>> ace hardware. Alternately, you can possibly try borax with a little
>> On Oct 25, 2015 4:37 PM, "jim" <<mailto:jim at well.com>jim at well.com> wrote:
>> I've soldered electronics and plumbing and
>> am stuck trying to solder copper sheet metal.
>> I've used a soldering iron and a propane torch.
>> I've used alcohol, acetone, and paint thinner
>> to clean the copper as well as fine and coarse
>> sandpaper to clean the surfaces. I'm using
>> electronic flux (haven't yet tried plumbing
>> The soldering is not working: solder does
>> not flow or adhere to the copper, and there's
>> a brown residue that appears after heating.
>> Using a torch for forty or fifty seconds
>> results in flame that does not immediately
>> Anybody got tips?
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>> Noisebridge-discuss at lists.noisebridge.net
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