High temperature corrosion of ADC12 aluminum alloy in oxalic acid solution was investigated using weight loss, electrochemical measurements, surface technologies. The results showed that at room temperature, the aluminum alloy exhibited localized corrosion, while at high temperatures, it exhibited uniform corrosion. As the temperature rose from 30 °C to 90 °C, the rapid dissolution of its passivation film led to a 70.19% increase in the corrosion rate. After soaking for 72 h, its corrosion rate decreased by 74.35% because of the depletion of hydrogen ions and the accumulation of corrosion products. The corrosion products were mainly AlO and aluminum oxalate.

中文翻译：

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ADC12铝合金在草酸溶液中的高温腐蚀行为

采用失重、电化学测量、表面技术研究了 ADC12 铝合金在草酸溶液中的高温腐蚀。结果表明，在室温下，铝合金表现出局部腐蚀，而在高温下，则表现出均匀腐蚀。随着温度从30℃升至90℃，其钝化膜迅速溶解，导致腐蚀速率增加70.19%。浸泡72 h后，由于氢离子的消耗和腐蚀产物的积累，其腐蚀速率下降了74.35%。腐蚀产物主要为Al2O和草酸铝。