Have to agree-- aluminium oxidizes almost
immediatly, when burnished, and as mentioned
the trick is to get the solder to the aluminum,
before it re-oxidizes . As an aside, the silvery
powder in a firecracker IS powdered aluminium,
which gives an idea of how FAST the stuff oxidizes
(burn, in this situation)! Jim NN7K


Helmut Wabnig wrote:
On Mon, 02 Oct 2006 23:03:33 GMT, "Lawrence Earl"
wrote:

The problem with soldering to aluminum is that the aluminum oxidixes before
it gets hot enough for the solder to stick. The trick is to puddle the
solder on the aluminum, them using a stanless brush or something the solder
won't stick to, brush the aluminum under the hot solder. That way the air
can't get ot it to oxidize it. The solder will tin it and stick fine. I have
been doing this since 1948.

Thanks, will try soon.
w.