"Leonard Caillouet" wrote in message
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"NSM" wrote in message
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"Master TV" wrote in message
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| A cold solder joint is when the part being soldered was not heated
| enough for the solder to grab on to it properly.
I spent 30 minutes watching a skilled tool and die maker try to resolder
the
radiator from his car with more and more heat and failing each time. I
finally asked him to let me try. I carefully cleaned all the parts,
using
wire brushes and acid flux and washing it all thoroughly afterwards, a
process taking over 15 minutes. I then soldered it in less than 10
seconds.
It isn't just heat that does the job. It's a combination of materials,
cleanliness, flux and heat. I've soldered everything from litz wire to
bus
bars and preparation is the key.
You are very much correct except that it is heat that does the job. The
cleaning is necesary for the heat to occur where you want it.
Only partially. The cleaning is also necessary to create a surface to which
the solder *can* bond. It won't bond to an oily/greasy surface nor to most
oxides. Only to bare metal.
Norm