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Soldering Process
Precleaning
All metal surfaces should be cleaned before assembly to
insure a sound soldered joint. There is a much better
chance of obtaining a sound joint if all grease, paint,
oil, dirt, rust, and oxides have been removed. Flux
should not be considered a substitute for precleaning
either by chemicals or by mechanical means.
Surfaces can also be prepared by sanding, grinding,
filing, cleaning with steel wool, or wire brushing
prior to being soldered.
REMEMBER:
Covering the surface with flux is no substitute
for thorough precleaning.
Some base metals may also require pre-coating to
facilitate the soldering process. Tin, tin-lead,
tin-zinc, tin-copper, copper, silver, iron and nickel
can be used for this purpose. Pre-coating affords the
following advantages:
- the soldering process is more uniform and quicker.
- strong acid fluxes can be avoided.
Pre-coating is especially important in working with
aluminum, aluminum bronzes, cast iron and high alloyed
steels.
Quick Tips:
Aluminum can be soldered more successfully once oxides
are removed by tinning the surface with an Aladdin’s
#49 “Knuckle-Saver” stainless steel brush.
Soldering Process continued... .
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