Weld/brazing of light metal alloys

A fluxless method of weld/brazing of light metal alloys to form a corrosion resistant structural assembly, comprising:

• (a) positioning a patch of brazing filler metal between and in contact with superimposed light metal alloy structural workpieces to define a joining spot, said filler metal consisting of a light metal alloy essentially consisting of 7-13% silicon, substantial absence of copper and magnesium, and the balance essentially a light metal alloy of the workpieces;
• (b) while applying high pressure to force the workpieces together at said joining spot to achieve a structural joint, resistively heating the interface between said patch and workpieces to melting without softening the workpieces, except at the interfacing surfaces thereof, by flowing an electrical current through the patch and aligned portions of the workpieces under ambient conditions and in the absence of flux, said heating and pressure being sufficient to mechanically break up and eliminate any oxides or lubricant on the interfacing surfaces of the workpieces at said joining spot and fuse said workpieces together.