... brazing are chemical cleaning, and abrasive or mechanical cleaning. In the case of mechanical cleaning, it is important to maintain the proper ... powder. Flux can also be applied using brazing rods with a coating of flux, or a flux core. In ... -zinc (brass)Gold-silverNickel alloySilverAmorphous brazing foil using nickel, iron, copper, silicon, boron, phosphorus, etc. Welding Tips: What Is Brazing?