rec.crafts.metalworking zinc solder on aluminum
After some time trying to get the much heralded zinc solder rods (No FluxNeeded!) to work on aluminum, a short paragraph from a maker's instruction showed the way: heat the aluminum while rubbing with the tip of the rod. When the aluminum gets to adequeat temperature, the zinc will melt & the rubbing clears the aluminum oxide. In other words, heat the aluminum not the zinc. The zinc makes an excellent thermal controller too. The aluminum/zinc area didn't show the slightest hint of excess temperature. Now, a flux is needed for situations where aluminum to be soldered can't be reached with the zinc rods. Any suggestions?
After some time trying to get the much heralded zinc solder rods (No Flux