FLUX FOR BRAZING OF ALUMINIUM

摘要

Flux for brazing of aluminium The invention discloses fluxes or compositions with fluxes which comprise fluoroaluminate anions and cations of potassium, cesium and of at least one kind of metals selected from the group consisting of cerium, bismuth and lanthanum. Such fluxes can be used for brazing aluminium and aluminium alloys with magnesium. They are especially suitable for brazing parts at least one of which has a thickness of less than 0.5 mm, for example brazing sheet to form a tube.