ALUMINUM ALLOY-BRAZING SHEET, FLUX COMPOSITION, AND COATING METHOD FOR FLUX COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide an inexpensive brazing sheet capable of enhancing brazability.SOLUTION: An aluminum alloy-brazing sheet comprises a core material consisting of an aluminum alloy containing magnesium, and a brazing material laminated on at least one surface of the core material. The brazing sheet has a flux layer comprising a flux composition laminated on one surface of the brazing material. The flux composition includes [A] a flux component including KAlF, and [B] a fluoride including the elements other than the first and second group elements, and excluding K. The value obtained by dividing a product of the addition amount X (pts.mass) of [B] the fluoride based on 100 pts.mass of [A] flux component in the flux layer, and the application amount Y per unit area (g/m) of the flux composition in solid content conversion by the magnesium content Z (mass%) of the core material is 50 g/mor more but 800 g/mor less.SELECTED DRAWING: Figure 1