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铸铁中加Ａｌ后，使得铸铁与锌液在５００～６００℃反应的化合物层由原来的柱状δ＋微薄的Γ相改变为块状δ＋Ｆｅ－Ａ１相．而且化合物层宽度显著增加。基体Ｆｅ的消耗主要由Ｆｅ原子通过化合物层的扩散所控制，因而显著提高了铸铁抗锌液腐蚀能力。随着Ａｌ含量增加，腐蚀速率降低，Ａｌ量为８．１％时其腐蚀性能比普通灰铸铁提高１０倍。
After the addition of Al in the cast iron, the compound layer of the reaction between the cast iron and the zinc solution at 500-600 ° C changes from the original columnar δ + meager Γ phase to a bulk δ + Fe-A1 phase. Moreover, the compound layer width is significantly increased. The consumption of matrix Fe is mainly controlled by the diffusion of Fe atoms through the compound layer, thus significantly improving the corrosion resistance of cast iron against zinc. With the increase of Al content, the corrosion rate is reduced, and the corrosion performance of Al is 8.1% higher than that of ordinary gray cast iron by 10 times.