How do I solder Aluminium 1000 series tube to Sn coated CRCA Plate?

09 September 2017 1 3K Report

I want to solder a Aluminium 1000 series tube to a Tin coated CRCA Steel Plate. At present the flux I'm using is not properly wetting the Aluminium tube surface and there are small holes present in the joint leading to leakages.

Marc Rody

Two choices. 1 a bit of Zn (5%) in 50/50 HCl as flux and tin solder or 2 for higher yield straight Zn as solder. HCl/Zn as flux is gassy so fume hood

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