所谓锌基三元合金,实际上是在锌中加入0.31～0.36%铝及0.2～0.25%铅,而含锌量不少于99.3%的一种混合体。由于锌液中含有较高的铝,当钢基体与锌液接触时,首先产生了 Fe_2Al_5的薄膜层,因此,使钢基体与锌液之间的反应受阻,阻止了 Fe—Zn合金层的生长,没有较长的接触时间,Fe—Zn 合金化的反应不会开始,即使随着浸锌时间的延长,熔解了 Fe_2Al_5薄膜而生成了 Fe—Zn 合金层,也会因为 Fe_2Al_5薄膜的 The so-called zinc-based ternary alloy, in fact, is a mixture of 0.31 to 0.36% aluminum and 0.2 to 0.25% lead, and a zinc content of not less than 99.3%. Due to the high aluminum content in the zinc solution, when the steel substrate is in contact with the zinc solution, a thin film layer of Fe 2 Al 5 is produced first, so that the reaction between the steel substrate and the zinc solution is hindered, preventing the growth of the Fe-Zn alloy layer , There is no longer contact time, Fe-Zn alloying reaction will not start, even with the leaching time, the dissolution of Fe2Al_5 film and the formation of Fe-Zn alloy layer, but also because of Fe2Al_5 film