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对铸态及完全人工时效处理的ZL10 4合金在 5 %NaCl盐雾介质中的耐腐蚀性进行了研究。采用扫描电镜 (SEM ) ,能量散射谱 (EDS)及红外光谱 (IR)等手段对材料不同状态下的组织及表面腐蚀产物进行了分析。结果表明 ,在腐蚀初始阶段 ,经细化和变质处理后的样品最先开始腐蚀 ,而未经处理的样品最后开始腐蚀 ,只经细化处理的样品居中。随着腐蚀时间的延长 ,上述样品的耐蚀性发生变化。经 44h以上的连续腐蚀后 ,上述样品的腐蚀速率趋于稳定。此时 ,未经细化和变质的样品具有最大的腐蚀深度和面积 ,而经细化加变质处理的样品耐蚀性最佳。红外分析表明腐蚀产物由含羟基的化合物组成。
The corrosion resistance of ZL10 4 alloy in as-cast and completely artificial aging treatment in 5% NaCl salt spray medium was studied. The microstructure and surface corrosion products under different states were analyzed by SEM, EDS and IR spectroscopy. The results show that at the initial stage of corrosion, the refined and deteriorated samples begin to corrode first, while the untreated samples finally begin to corrode, and only the refined samples are centered. With the extension of corrosion time, the corrosion resistance of the above samples changed. After 44h continuous corrosion, the corrosion rate of the above samples tends to be stable. At this point, the sample without fining and metamorphism has the largest depth of corrosion and the area, while the sample with the refined and metamorphic treatment has the best corrosion resistance. Infrared analysis shows that the corrosion products consist of hydroxyl-containing compounds.