Greetings everyone -
I have used the following process to make soldered connections to Aluminum
using regular PC-board solder:
1 - Remove the oxidized surface by polishing/filing/sandpapering/etc
2 - Immediately after de-oxidizing, coat the surface with oil (I use 10W30
motor oil)
3 - Heat the surface using the biggest soldering iron you can find. While
you are
heating the aluminum, constantly abrade the aluminum surface with
the S-I-
tip to maintain an active (non-oxidized) surface below the oil-film
air-
barrier.
4 - Once the aluminum is sufficiently hot, start applying the solder and
continue
scrubbing the al-surface with the S-I tip
5 - Eventually you will see the solder flow and bond to the aluminum at
which
point you are done. Puddle-up a solder-ball to simplify making
soldered
connections later.
I have used this method and after several years of being outside in the
weather
seven miles from the ocean, there was no deterioration/corrosion at these
connections.
73 -
Dick - w7wkr CN98pi
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