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研究了不同Ａｌ含量的Ａｌ－Ｓｉ合金铸铁在热浸锌过程中的腐蚀速率、界面组织结构和成分变化。结果表明，随着合金铸铁中Ａｌ和Ｓｉ含量升高腐蚀速率降低，当Ａｌ－Ｓｉ总量为１０（ｗｔ）％时，腐蚀速率小于普通灰铁的１０％。Ａｌ－Ｓｉ合金铸铁锌液腐蚀的原因：（１）表层形成较稳定的Ｆｅ３Ａｌ、ＦｅＡｌ或Ｆｅ３Ｓｉ、Ｆｅ５Ｓｉ３相；（２）界面层中形成较厚的合金相层；二者均使铸铁与锌液反应扩散速率降低。另外，石墨与基体的边界为Ｚｎ原子的侵入提供了通道，温度越高浸蚀越重。在同样的化学成分条件下，球状或蠕状石墨铸铁优于片状石墨铸铁的抗蚀性。
The corrosion rate, interfacial microstructure and composition of Al-Si alloy cast iron with different Al contents during hot-dip galvanizing were investigated. The results show that the corrosion rate decreases with the increase of Al and Si contents in alloy cast iron. When the total amount of Al-Si is 10%, the corrosion rate is less than 10% of ordinary gray iron. Al-Si alloy cast iron zinc solution corrosion reasons: (1) the surface to form a more stable Fe3Al, FeAl or Fe3Si, Fe5Si3 phase; (2) the interface layer to form a thick alloy phase; both are made of iron and zinc solution Reaction diffusion rate decreases. In addition, the boundary between graphite and matrix provides a channel for the intrusion of Zn atoms. The higher the temperature, the more severe the etching. Under the same chemical composition, spherical or creep graphite cast iron is superior to flake graphite cast iron for corrosion resistance.