| 摘要 |
PURPOSE:To improve the corrosion resistance of a product by using jointly a Zn-Al compound alloy powder together with a powder flux mainly composed of a fluoride. CONSTITUTION:30wt.pts. flux powder mainly composed of a fluoride such as KF or AlF3, etc., and 1-8wt.pts. Zn alloy powder (1-200mum average particle diameter) containing 3-30% Al are mixed. To this mixture, a solvent of alcohol, etc. is added, a flux suspension of about 5-20% solute density is made, and it is applied to the surface of an Al material to be brazed, and dried. Subsequently, this Al material is brazed in an inert gas. According to this method, a uniform sacrifice anodic oxide layer is formed on the surface of the Al material to be brazed, therefore, the corrosion resistance of the Al material of a product is improved. |
