If you have problems with
excessive corrosion of the solder bit when using lead-free solder, try a
solder with 1% or 2% copper.
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| picture credit: reddit |
Without lead in the composition
of the solder, the copper is gradually robbed from the bit during soldering. The
solder gradually erodes the copper from the soldering bit in the absence of lead.
In some, way the lead prevents the erosion of copper and so copper in the solder
is not needed.
Picture credit\: RS Components
Once the copper is eroded, the
steel corrodes rapidly. The tips are steel with a copper plate. Eventually the
steel is exposed. Then the corrosion occurs really rapidly.
Having a bit of copper in the lead-free
solder prevents the robbing of copper from the tip. There are a
variety of lead-free solders available. Many have a little copper in their
composition to prevent the erosion of the copper on the bit. There is a listing
of some of them here.
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