Add one more. Quenching into hot pickle. A freshly soldered joint is
a very fragile and tender connection and until it cools and
solidifies, it is should be treated with care. Throwing a freshly
soldered joint into a hot acid bath can create minute fractures and
pits into your solder.
Wait 10 seconds and allow your solder to do its job. What’s the
rush? Ten seconds in air and a cooling cycle in room temp water and
then pickle will create a strong bond.
As a tip, I usually keep a loop around my neck to inspect a
completed solder operation. What you see with your naked eye is a
completely different world when scrutinized under magnification.
Sometimes I think I have totally nailed a good solder operation, and
then viewed under a loupe, I go EEK!