[Noisebridge-discuss] soldering copper sheet metal

[jim]

     Thank you! I'm gonna get some of each
and report.


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 
> water.
>
> On Oct 25, 2015 4:37 PM, "jim" <jim at well.com <mailto: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
>     flux).
>         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
>     expire.
>
>         Anybody got tips?
>
>
>
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