Ernie, thanks for the link on the allstate 31 brazing alloy. I am a refrigeration tech and we have tried all that we knew was available (with very little sucess). Also tried the epoxy etc. Will give this a shot. Small evaporators get replaced, but on say, a 12 foot display case they get pricey. The latest blow to the industry is the manufacturers are going to start shipping aluminum condensers. They always have on A/C units but have kept out of the commercial refrigeration. Due to economics etc. it is coming our way. If a customer has $20,000 worth of ice cream dripping out of the packages, it is a poor time to tell him you will order him a new condenser. We had best have a way to fix it. Thanks Lyndell P.S. Without you going to a lot of trouble, if you know the part number or style of this alloy the service techs use.......I would be very grateful for the info.
snip,
Instead of welding you can go with the very popular Brazing solution
Allstate 31 Aluminum Brazing Alloy is used extensively by refrigeration technicians for aluminum coolant lines. It works for a lot of other applications as well.