| 摘要 |
PURPOSE:To obtain a good brazing joining with improving the corrosion resis tance of Al brazing article by performing a brazing after precipitating the specific quantity of zinc on the surface of Al material. CONSTITUTION:A zinc is precipitated in 0.6-10g/m<2> on one part or all part of the surface of the joining member made of Al. The flux used for brazing is the mixture of 80-99.8wt% KalF and 20-0.2wt% KF. In case of performing a bracing the flux component is used with suspending in the form of a slurry in the liquid of water, etc. and this suspension is uniformly coated on at least either one part of the joining member made of Al. A brazing joining is achieved with drying after the coating and with heating to the temp. lower than the melting point of the joining member and higher than the melting point of the flux in the nonoxidizing atmosphere of inert gas atmosphere etc. with using the Al alloy brazing filler metal having lower melting point than the joining member.
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