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Hacker Chronicles 2
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210.49
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1979-12-31
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* Aluminum can burst into bright
flame and self-destruct.
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So, to weld aluminum, you have
to work a bit differently.
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Let's do a practice session on a
typical application.
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STEP 1
Get a housing from a small
transmission, a motorcycle or
moped engine casing or a washing
machine gear box. Clean an area
to weld some beads. Aluminum
must not only be clean, but must
be sanded or filed to remove an
invisibe thin layer of oxide
that forms. This should be done
just moments before welding.
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STEP 2
Support the piece to be welded
from underneath as well as by
its edges. Use blocks of steel
as furniture. Unsupported
aluminum often sags and warps
out of shape when welded.
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STEP 3
Light the torch using less gas
velocity and one size larger tip
than you would for steel. Normal
gas velocity would blow light
weight liquid aluminum away.
Less gas velocity does not work
with steel because the sparks
would backfire the flame, but
aluminum creates no sparks.
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