Why can't iron solder weld aluminum wire?
Iron wire can also be welded, but the welding surface should be treated well, and then use zinc coating treatment of hydrochloric acid solution, and then welding, aluminum wire can not, because tin does not pass special processing, with aluminum wire melt together
Because the melting point of copper wire and aluminum wire.
Copper oxide, aluminum oxide, iron oxide and so on are not easily used in soldering welding. That's why welding flux is needed.
