在模拟的潮湿大气腐蚀环境下，研究了AlSi7Mg0.3— —ZL101、电解ZL101、A356三种合金的组织结构对其腐蚀形貌的影响.金相组织、扫描电镜 腐蚀形貌分析和波谱仪成分分析表明，化学元素分布均匀、金相组织均匀细小是电解Al-Si 合金具有良好耐蚀性能的原因.X射线衍射分析表明A356合金的杂质相极少，这是其具有较 好耐蚀性能的重要原因.
The effect of microstructure on corrosion morphology of ZL101 alloy,Electrolytic ZL101 alloy and A356 alloy in a simulated atmosphe ric environment with moisture is studied.The experimental results on microstruct ure and corrosion morphology by SEM and chemical composition analysis by WDS indicate that the excellent corrosion resistance of electrolytic Al-Si alloy is related to both the homogeneity of chemical composition and the fine microst ructure of alloy.The results of XDA indicate that less amount of impurity phase in A356 is responsible for its better corrosion resistance.
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