本发明提供一种钎焊强度高、抗腐蚀强的锌铝药芯钎料，该药芯钎料包括钎剂内芯和包覆在钎剂内芯外的外部金属皮，钎剂内芯由AlF3和RbF二元共晶配制而成，外部金属皮为三层夹心金属皮，该三层夹心金属皮包括外层Al和夹心层Zn98Al，其制备方法为：1）、将称量好的铝熔炼、浇铸成含中心孔的铝铸锭；2）、将称量好的Zn98Al合金熔炼成金属液浇铸到中心孔内，铸锭冷却后挤压、轧制成具有三层夹心的金属皮；3）、按质量份数称取AlF3和RbF，配制成钎剂内芯；4）、取外部金属皮包覆钎剂内芯，通过轧制、拉拔形成锌铝药芯钎料，本发明钎料金属皮抵抗内芯钎剂和环境气氛的腐蚀性能较好，从而延缓或抑制了钎料“脆化”现象的发生。

The invention provides zinc-aluminum flux-cored solder with high soldering strength and corrosion resistance. The zinc-aluminum flux-cored solder with high soldering strength and corrosion resistancecomprises a solder core and outer metal skin wrapping the solder core. The solder core is prepared from AlF3 and RbF in a eutectic mode. The outer metal skin is a three-layer sandwich metal skin whichcomprises an outer layer A1 and a sandwich layer Zn98Al. A preparation method of the zinc-aluminum flux-cored solder with high soldering strength and corrosion resistance comprises the steps that (1)weighed aluminum is smelted and cast to form an aluminum cast ingot provided with a center hole; (2) weighed Zn98Al alloy is smelted into molten metal to be poured into the center hole, the cast ingot is extruded and rolled into the three-layer sandwich metal skin after being cooled; (3) AlF3 and RbF are weighed according to mass parts to prepare the solder core; and (4) the solder core is wrapped with the outer metal skin, and the zinc-aluminum core solder is formed through rolling and drawing. The metal skin of the solder can well resist corrosion of the core solder and the environmental atmosphere, and thus, the phenomenon of embrittlement of the solder is delayed or restrained.