The invention discloses a
soldering metal replacement no lead
welding scaling
powder for aluminum and aluminum
alloy, which is composed of the following weight proportions: 5 to 50 percent of
metal salt that can be reduced by the aluminum, 10 to 15 percent of stripper, 3 to 40 percent of
wetting agent, 3 to 20 percent of activating agent, 1 to 15 percent of surface
active agent, 2 to 20 percent of inhibiter and a carrier with the rest percent. The invention has an extremely excellent matching effect with a lead-free solder in the
welding temperature and is suitable for being made into a
welding stick or a welding paste with the lead-free solder. After welding, the invention has a high welding intensity and a good
expansion rate, belongs to an environment protection scaling
powder, and has the function of inhibition protection on the aluminum and aluminum
alloy as well as a simple and practical preparing method. Undoubtedly, the embodiment can also be used for the no lead
soldering on the materials like stainless steel, galvanized iron,
copper and
copper alloy, etc., and bear the same effects as well.