Multi-stranded copper tin electrical solders that break?
published: 17/10/19, 11:30
I found that some electric solders (on multi-stranded cable) became brittle after a few weeks: the copper core became more fragile and eventually broke.
I am on a project of electric propulsion since 3 years, I made hundreds of welds, the problem appeared on 2 or 3 welds it is little but it is too much and I would like to understand why?
a) Soldering iron too hot?
b) Quality of the tin (I have several Chinese coils ...)?
c) Bad tinning product (it's still an old bottle that must have been 10 for )?
d) I do not know how to weld?
The cables in question are not mechanically constrained, the last ones were even completely protected by a heat-shrinkable sheath so they remained almost immobile the problem is not mechanical.
Also I also respect the instructions of amperages: the welds which break do not have too much heat ...
It looks like the break is after the tinning zone ...
I am on a project of electric propulsion since 3 years, I made hundreds of welds, the problem appeared on 2 or 3 welds it is little but it is too much and I would like to understand why?
a) Soldering iron too hot?
b) Quality of the tin (I have several Chinese coils ...)?
c) Bad tinning product (it's still an old bottle that must have been 10 for )?
d) I do not know how to weld?
The cables in question are not mechanically constrained, the last ones were even completely protected by a heat-shrinkable sheath so they remained almost immobile the problem is not mechanical.
Also I also respect the instructions of amperages: the welds which break do not have too much heat ...
It looks like the break is after the tinning zone ...