[TowerTalk] Cadwelding vs Silver Solder for Ground Radial Systems

[Jim Lux]

At 08:45 AM 7/9/2006, you wrote:
>One point that may need watching in these environmentally sensitive, PC 
>days. Anything with cadmium that could possibly leach into the ground/ 
>ground water over here is a positive 'no-no'. It's very difficult over 
>here to even get passivated cadmium plated screws - they're all bright 
>zinc plate now. Silver solder, especially the cadmium free varities get 
>around this


I don't think Cadweld (tm) exothermic welding has any Cadmium in it.  It's 
a mixture of copper oxide and aluminum powder (i.e. thermite) in a ceramic 
crucible.

The name comes from the inventor: Charles Cadwell