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Degrade? It all depends -- on what you mean!!!!! If we take the example
of 63/37, the Sn oxidises more readily than the Pb as the temp rises.
Eutectic is not synonymous with azeotropic. So overheating could lead to
a small amount of Pb-rich.
You could monitor the temp with a hand-held thermometer (probably more
accurate than the thermostat, anyway!) as you manipulate the on-off
switch. However, as a rule, I've found with most machines that if the
solder is heated to working temp, I can ladle out all the accessible
stuff into ingots before it solidifies, without any power.
Brian
Steve Gregory wrote:
> Mornin' All!
>
> If the solder in a wave solder pot gets a little hot, it doesn't really
> degrade it does it?
>
> Situation is; I'm emptying three solder pots, one 63/37 pot, one SN96
> pot, and one HMP pot, the way the pots are designed is that the pot
> thermocouples are located up towards the top of the pot. So as I lower
> the level of the solder in the pot, at some point the thermocouples will
> not be in direct contact with the solder and thus not be giving me the
> actual solder temperature.
>
> I've been cycling the heater power off when it looks like the solder is
> getting pretty hot (it starts getting getting this golden sheen to it),
> along with disconnecting the heaters when they start getting exposed as
> the solder level goes down.
>
> I've always emptied pots this way, and just started wondering if the
> solder degrades at all if you heat it up beyond the liquidous
> temperature. I know it makes a little more dross as the temperature
> rises...
>
> Steve
>
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