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<font face="monospace"> oh: yes, I want to solder the pieces
together. <br>
I've tried with clamping--no dice. <br>
<br>
</font><br>
<div class="moz-cite-prefix">On 11/01/2015 03:28 AM, jim wrote:<br>
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<font face="monospace"> yes. I've cut small pieces of 30 gauge
and also 24 <br>
gauge and have tried to tin them (tin 'em first, then <br>
solder them together, yes?) with horrid results: a dark <br>
brown crust develops that shows little round pin-head <br>
sized circles and the solder just sits in a ball and <br>
then rolls off. <br>
I've used two different types of flux and various <br>
types of solder (tin-lead, silver...). <br>
I've gotten the copper bright red with a propane <br>
torch. I've used a soldering iron. <br>
I've washed them with alcohol, paint thinner, and <br>
muriatic acid; I've also washed them with a solution <br>
of lye and sodium carbonate and borax. I've sanded <br>
them with fine and with coarse paper, by hand and <br>
with an orbital sander. <br>
<br>
In the past I've soldered electronic circuits and <br>
copper pipe successfully. <br>
A couple of experienced people say it sounds like <br>
the surface of the copper sheets is contaminated, but <br>
golly! After all that scrubbing and washing and flux <br>
and heating? <br>
<br>
<br>
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<div class="moz-cite-prefix">On 11/01/2015 03:08 AM, Cere Davis
wrote:<br>
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cite="mid:CAKtSE-vPeV=rciwXWxZgWrwNBWTaizZ_bcicX+yoypjYrAaxWw@mail.gmail.com"
type="cite">
<p dir="ltr">So ur just trying to solder copper to copper? </p>
<div class="gmail_quote">On Oct 25, 2015 4:37 PM, "jim" <<a
moz-do-not-send="true" class="moz-txt-link-abbreviated"
href="mailto:jim@well.com"><a class="moz-txt-link-abbreviated" href="mailto:jim@well.com">jim@well.com</a></a>> wrote:<br
type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
I've soldered electronics and plumbing and<br>
am stuck trying to solder copper sheet metal.<br>
I've used a soldering iron and a propane torch.<br>
I've used alcohol, acetone, and paint thinner<br>
to clean the copper as well as fine and coarse<br>
sandpaper to clean the surfaces. I'm using<br>
electronic flux (haven't yet tried plumbing<br>
flux).<br>
The soldering is not working: solder does<br>
not flow or adhere to the copper, and there's<br>
a brown residue that appears after heating.<br>
Using a torch for forty or fifty seconds<br>
results in flame that does not immediately<br>
expire.<br>
<br>
Anybody got tips?<br>
<br>
<br>
<br>
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