Mixing lead and silver solders?

[blockmanjohn]

HI,

I assembled some small fittings using 50/50 soft solder. This turned out to be not strong enough and the parts failed (came apart). I plan to use silver solder next, but these small parts are still tinned from the lead solder. It is not possible to remove this tinning without making new parts.

I do not have a lot of experience with silver solder and am wondering if it will stick to these tinned parts. Are there any special preparations I would have to make?

Thanks in advance, John.

 

[clifforddward]

In order to silver solder these parts successfully you will need to remove all evidence of the tinning. The tinning will act as a barrier and keep the silver solder from sticking